How about a caravan or motor-home instead of a tent?
It's a lot of investment I know, and has obvious drawbacks in terms of how far off road you can realistically go, but there are plenty of advantages as well. Aside from prepping, it does give you a holiday option, extra storage space, guest accommodation, home office......
If you did secure some land of your own and could a vehicle get onto it, then all the preps you mention such as latrines, fire pits and pre planting some trees / bushes, would still apply.
)that that might not be a disadvantage in the end. It would be terrifying, no doubt about it - but if negotiations can be opened between all the new arrivals, a very "can do" community just might evolve. We've no idea what kind of event we're talking about that would mean evacuating to abandoned mines, of course, but a self selecting community prepared to do what it takes to survive might end up being no bad thing.
