FWIW, here in the PNW two of the biggies are Flying J and Pilot.  Both are
clean modern truck stops.  I have 'camped' in their lots and have used their
facilities.  For showers, you just ask at the counter.  If they're busy, have
a seat in the cafe and they will call you when the shower is open.  First
choice is always a State Park, but the name truck stops are a good
alternative.  Regarding 'shady characters', must be a big city thing.  Not too
much of a problem once you leave the megalopolis.  But, there can be trouble
ANYWHERE. (Including Wal-Mart parking lots.)

Wood burning stoves...  I think that Hoover had a few words to say on the
subject.  I'll check the CD. (It was a loonnngggg time ago.  Shortly after
Grendel, I believe.)  Might be on the type2 archives.  http://vw.i405.com/

Jim Arnott
WetWesties
Union, OR