I know where you are talking about. We spent a week at the Escapees park and rode around that area and it didn't look like an area to be hauling any large rigs. This year we stopped at Constellation park in Wickenburg and met another couple who stop there twice a year. They said that last year a TT was broken into during the day when the person went to town.
I didn't have a bad feeling in that park but the couple asked us a few times to extend our stay because they obviously weren't comfortable yet they liked the park. We were the only ones there and they parked next to us.
The market may be doing well but I sure dont believe it's a true reflection of life in the USA. I go to camp after camp that has a good number of basically homeless people. They ones that can afford to still be in a van or RV or something are called the "Wealthy homeless". I dont consider them all bad people but when push comes to shove and someone wants something they take it. There are a good number of people out there who are living the mobile lifestyle and look at others with jealousy. You notice it on some forums with comments like "Those people in the big motorhome" or "They came rolling in with their fancy fifth wheel". Any generators come up missing in Scaddan wash this year? ;)
It seems most likely to run into trouble around cities and I'm not talking about Chicago or St Louis. I'm talking about Quartzsite or Yuma or Deming or wherever. The "Wealthy homeless" cant afford to drive far and the panhandling and theft opportunities are better in town. Look for vans and old class C's with contractor generators on a wood frame ready to fall off the back.