>" am a bit paranoid when camping in very populated areas, "
Just because you're paranoid, doesn't mean the world isn't out to get you.
But seriously, the incidence of pathological behavior drops dramatically the further you get from the pavement. ESPECIALLY when the only thing out there is joy of the outdoors. When there's tasty game animals, you get a broader spectrum (the vast majority of whom are great people). When there's gold, diamonds, or pot; you get the other, undesireable end of the spectrum.
But when it's just a hiking trail - I've never had a problem with theft, and people have been amazingly helpful if you just ask.