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.
I’ve never been to a rural area where there weren’t at least a few places with a higher passerby frequency than that.