I've been staying at the mart of wal for a while (it's free!) and so far I've only had one bother (not really a big bother, just a few eggs short of an omelet and outgoing but nice.) As a precaution I keep all my doors locked, take the keys out of the ignition and I carry utility knives, a baseball bat, a walking stick, heavy dowel rods and those spiked wrist cuffs from Hot Topic, i.e, as much weaponry as I can get away with, without inviting any legal hasslement. Key thing is to forgo things like guns, knives, samurai swords, nunchucks, etc. and stick to weapons that have non-weapon uses so it's plausibly deniable if anyone sets out to give you trouble for being armed. The rv has a door alarm but I haven't figured out how it works yet. So far it seems like the walmarts in nicer neighborhoods are, paradoxically, the least inviting for overnighters. I like to relax with a few wine coolers in the evening, and if Officer Friendly comes nosing around and sees that I've had my seagram's, I could be in (unreasonable, ridiculous, pointless) trouble. The less uptight the neighborhood, the safer. Also in persnickety neighborhoods, the kids raising a ruckus are well-protected, spoiled entitled brats and probably have rich parents so they get away with much more than they should. They're the ones to worry about...I used to live in a town like that and I was that type of rowdy delinquent kid so I know. Drunks, homeless, crackheads, etc., they're just desperate and if you make clear that you don't have what they're after/you're not an easy mark, they'll go away. But spoiled suburban kids...they just want to see the world burn because that's how bored and narcissistic they are.