Rest area, truck stop, and Walmart. Napped at all of them. I don't put down the stabilizers for naps. Typically I am only there for a couple hours before hitting the road again. My bed is a lot better than sleeping in the truck. I have done that some too.
2015 A122S and 2011 Work and Play WR30
2005 F-150 SuperCrew, 5.4L, tow package, 3.73 axle
2011 F-350 SuperCrew, 6.7L, FX4, 4x4, DRW, tow package, 3.55 axle