Hey Chance - what a great vision you have - I love the way you are "cross pollinating" with others to spread gardening to people who maybe never tried, or maybe did have some 'black thumb' experiences. These trees seem like a great way to do it, and their productivity is out of proportion to their footprint and effort!
Once you get your little spinney of columnar trees on hand, post some pics to let us know where they settled in. I planted thyme and chamomile around the base of my tree, even when it was in a pot, and continued when it was in ground. Let's see what your imagination brings.
Also Timothy (looking for online options) I am glad to give a shout out and two thumbs up to Raintree Nursery for the quality and variety of what they offer.
AND - golly I love the idea of a columnar pear. I have espaliered ones, but am thinking the columnar is a great consideration also.
Hey Jay - about the deer - yeahhhhh here too - those critters are completely shameless in defoliating all the plants I love. And a small columnar tree would be very vulnerable to them. They don't even walk away when I holler. They just look at me as if to say that I am clearly not any type of threat, until I actively walk over and shoo them away. (Sigh. Well, hunting season is coming...)
I am sure I am very late-to-the-party on this, but just last week I found a bunch of Paul's info on 'Bone Sauce' as a deer deterrent from Sepp Holzer, (see this thread - scroll down:
https://permies.com/t/239042/Defending-apples-trees-hares) and have been reading about it in Sepp's Permaculture book. Since we have a statewide burn ban, I can't create the bone portion of that right now... but in his book, Sepp says that the burned bones ingredient in the formula can be substituted with Beechwood tar (
https://mydrxm.com/products/kerbl-tarpaste-beech-tar-1-kg) and burnt hair/hide/pig bristles. Nothing that will offend a burn ban. So I am gathering the tar and the animal hair, rancid oil, slaked lime, cow manure and sand to make up a batch, and I am going to give it a determined try. I will let you know how it goes for the espaliered fruit trees in particular! It should be a good protection of vulnerable trees like the columnars.