George Ingles

That would be an interesting map to look at, but I suggest it be voluntary to add your location to the map, not automatic.
People have different comfort levels regarding privacy, and some might not want to be even vaguely pinpointed.
But I would find it fascinating to see a map like you describe, and it surely could help people connect.

When I was a kid, my family had a camper with a foot pump sink.  I remember stepping on it repeatedly to keep the water flowing, like it was a direct mechanical effect.  
When I was working in a restaurant kitchen, we had a very nice little stainless steel handwashing sink that had hot and cold pedals that one just steps on and it was automatic water, no foot-pumping.
So if there is a used restaurant supply store in your area, you might find such a thing there.
I think it's hygienically a smart notion.

Around here, the first things I notice are the Cleavers and Stinging Nettles.
I like the Cleavers fresh when the plants are small, though even the bigger ones are still nibble worthy.
I have a very short window with the Nettles before the aphids and tiny beetles take up residence on them - (not that they can't be shaken off or washed).  I prefer pinching off the topmost part of new Nettles and crushing it between thumb and fingers to get rid of the stings and then I eat them raw directly.  Steamed, Souped, or made into a mess-o-greens in the pan is good too.
I welcome Nettle stings as medicine too - I often intentionally get myself stung where I have sore muscles or the like for pain relief.
Lemon Balm is rather early here too, and I enjoy the fresh leaves for snacking.
Also overwintered Parsley, Kale, Mustard, Beetroots and such from the garden are at their prime for eating at this time (some years).

Plantain! (Plantago spp.)

It is found in myriad places and has a great many uses.

My first herbal medicine I consciously adopted was using chewed up plantain leaf to cure bee stings.
I used to swell up a lot from just a single honeybee sting, until I learned the power of the plantain poultice.
If I get it applied right away, there is basically no swelling or itching.

This same chewed poultice approach is great for helping any kinds of surface wounds, I've found.  
I have used it to help pull out deep splinters/slivers/thorns and ingrown hair situations.
I've used Honey infused with the plantain leaves as an excellent remedy for sore throats and bronchial colds.  
I also frequently chew on the leaves and keep them in my mouth like chaw, though I was never a tabaccy chewer.
The seeds are good food at various stages - and I think bulk fiber supplements are often made with seeds from the genus.

I find if I want to use Plantain poultice as an herbal bandage it works better by including some common Mallow leaves with the Plantain and chew it up together.  If I get the right mix, it will dry and stay glued on like a patch over a cut or wound.
Plantain has many other uses, but those are the main ways I enjoy this herb.
As always, be sure to properly identify plants... and the above is not medical advice.

I favor Permies much more!

AI, in my experience, is just computer software that 'pretends' to have a personality and presents the work of others as its own facts.
Frequently the information offered is strangely irrelevant or flat wrong.
AI confuses and misleads many - and using it deprives us of the delightful activity of *doing research*!
It seems to me that reliance on AI is weakening to the mind and funnels thinking into narrow paths.
Permies is frequented and maintained by many individuals with many backgrounds and real-life experiences in particular places.
Sometimes the posts on Permies.com goes beyond mere information or knowledge - sometimes Wisdom is shared here.
I am so glad Permies is here!  I hope AI becomes a humble calculator type tool instead of a demigod figure.

Don't doubt the prowess of idiots.
I had a friend who was house sitting for his parents in the countryside, and another friend of his was there.
In the backyard there, they were target shooting with bows (and probably drinking -bad idea!).
This careless friend of his shot an arrow way up in the air 'for fun'... and it landed over the fence right on the neighbor's walking path.
My friend was confronted by the neighbors and had to explain and apologize.
He was so furious that he severed ties with the other friend.

There is certainly lots of oxalic acid in the Sheep Sorrel (Rumex acetosella) - - I hadn't known of that reaction being useful for cleaning, interesting.
If it is Sheep Sorrel they are referring to, it's got all those tangly root/rhizomes that, bunched up in the hand, would be sort of like one of those metal scours for dishes.  Grabbing a big handful and letting it shred apart makes sense to me for cleaning.

I've read that old-timers would use Tansy ragwort (Jacobea vulgaris) for scouring pans - hence the common name rag wort.

That's some interesting information via those links posted above.  
I hadn't done any research into the benefits of tree gums and their specific particular uses, aside from some famous examples like Frankincense and Myrrh/Guggulu.  
I get my Pine pitch from the tree by the Horse pasture fence -- I don't think that is much help to you, sorry.
I will say that there are some consistencies in the pitch I prefer.  I like the stuff that has been drying on the tree awhile and has a gummy consistency.  The already-crystalized pitch works okay too.  The fresh pitch is too sticky to work with easily, for me.

Good reminder about Raspberries- lots of Calcium there!  I will remember to gather leaves for tea this year!
Did you boil down the Birch sap or use it fresh?  I would think maybe it keeps better once reduced, but I don't have experience.
 

I've used the gum.  What I think I understand about Xylitol is that it is derived from Birch tree sap.
I've read that it is a kind of sugar that the cavity-causing bacteria prefer, but they suffocate from eating it.
I have not heard of it being used for rebuilding enamel, but I would love for that to be possible and will research now.

Perhaps tapping Birch trees and using the sap directly could work?
I often chew on pitch from Pine trees.  It is good for temporarily filling the cavity pockets and getting food debris out of there.  It feels very antibacterial - I wish I had started much earlier.