Interstate rest area stops

I am in WA State, we have a few newly expanded rest areas where they have built additional large parking lots further from the freeway and outside of the normal truck, car, parking areas. These are for RV's or trucks that plan to stay longer. It is intentional and designed not for camping, but for people that need to overnight. Better to give people a place to sleep vs have them park anywhere or try to drive when they shouldn't. Hopefully other states will start doing this. I prefer to find a boondock site near a river or something to make a night out of it, but I did do one night in a Wal-Mart parking lot a couple years ago. Much quieter than the freeway off ramp.