I live and work in one of the richest agricultural areas of the country and have seen trainloads of produce rotting in the fields and/or plowed under. I have thought it was such a waste and wondered why homeless individual didn’t
"set up camp” somewhere in the area for gleaning the rabbits and veggies, even though the taking of either one would be illegal.

What land did you have in mind that could be lived “off of” and what could be taken while acting within the law?

Seasonal migration would seem to be the way to go, if there were no restrictions.