The trenches are open: what else should we drop in?

I'm know I'm getting ahead of myself but infrastructure isnt something you can easily redo so let's say we have the trenches run between the homesteads of our ev, we've already dropped in water lines, power, and a conduit: what do we put in the conduit?

Ethernet for a wired local network? pros/cons? Better alternative?

Phone line for another local network incase cell network goes down? P/c? Better alternative?

Coaxial cable? Is there something useful there we haven't thought of?

Yall are the experts.

Bah... I typed out a response and it was lost upon having to log in.

Anyways, a few ideas:

-A decent WiFi router or WiFi repeater may work well depending on your particular circumstances. My Wifi happily reaches my barn some 300ft away from the house.

-Wired security cams? Again, many wireless products are available today.

-Outdoor electrical boxes coming off of your main trench line? Something I am doing currently.

-Power/switching wires for outdoor lighting?

Cell booster coax cable...

I've got one way up in a tree, the cable buried to the house.

You know, poly water piping isn't that expensive. It occurs to me that running a couple of 1/2" lines (3/4 is better) gives you the option to add things in the future. You can use a stiff wire to snake through it.

Ideas:
- alternate electrical, say from a solar setup for lighting
- raw rain/pond water on a gravity feed
- compressed air (low pressure, high volume)
- data cables (who knows what we'll need 7 years from now)

Don't forget to pay attention to distances between your conduits.  I believe having power close to communication cables can cause interference.

A strong wire can be used as a pull string, allowing you to decide in the future what you want to add.
12 stranded is sufficient, 10 is even better.

Long distances of data prefer Fiber Optic...
Coax will die out on you.
A pull cable and empty tube can help but Fiber is cheap.

Reverse power... run a 20 amp and another 20/15 amp (maybe 30-40amp for pumps?) back from panel out to where you are pulling from.
1) to power that fiber in case you need it (coax from cable co to fiber long distance to house back to coax) You'd need to power a coax to fiber run to you house for long distances. Cap that and secure that all in a tidy box.
2) power pump.
3) lights
4) gate etc
5) use underground coax so that when, not if, but when an animal bites it that it tastes terrible and hopefully they stop.

If your network cable is underground make sure to use aquaseal or another brand of direct burial out outdoor rated cable.
Any distance over 326 ft will call either a powered injector or a POE booster in the middle or every 300 feet. Poe is easy just have your conduit come into a box preferably one above ground so it won't flood. This will come in extremely useful if you plan for cameras or boosters.

Fiber is a great option but it requires a very clean housing that's very protected so I wouldn't pull it in unless you plan to get it soon and I'd ask the provider how many strands they need and what type of connectors.

Make sure if it is a high traffic area to use schedule 80  pipe so it's less likely to Crack.

I always put in 1 or 2 extra conduits on a jobsite and make sure to get some rhino tape or pull string in it so you won't have to fish it years from now.

Lastly I would make sure to get some metallic burial marker tape so you and the utility company can find the conduits again years from now!