This seems to be something people don't always give second thought to. When people talk about the homeless, the first things thought about are images of people on busy city streets in rusty clothes waiting around near allies. In there, the answer is quite static, because it can be I guess. But if that's the case, change the setting and that changes too. In the places where I've lived, people often needed that mapped out. Where are they known in your rural locales?
There's not many where I live because homeless people usually need to beg and there's no point begging in the countryside where you'll see three people a day.
Well, I lived in a rural area where you can sit on a side of a road and see zero cars during the day. I mean you can try begging some frogs or foxes...