Some of the newer ones, but I usually park in the truck parking area at Pilot/ Flying J/ Loves/ Transamerica/ Petro and other truck stops.
Places like Flying J/ Pilot/ Cracker Barrel usually set a 40 foot long space as an 'RV spot'.
My rig is 62 feet long, so that's too short for me. Never had an issue or complaint about parking alongside the trucks. Usually get comments/questions about the rig, and the full-time lifestyle.
At the Newburgh NY Pilot on 17K just off I-84 exit 6 - the gas pumps were too close to the building for me to get to them. Certainly no RV parking spots out front. I needed to weigh the trailer anyway, so I made my first two passes through the scales, backed into a big truck parking spot - unhooked the trailer - went back to the scales, then to the gasoline pumps, then back to hook up to the trailer. No problems/ issues.
But be aware that some truck stops have reserved spots for some trucks - so don't park in those.
Full-Time 2014 - ????
โNot all who wander are lost.โ
"You were supposed to turn back at the last street."
2012 Ram 2500 Mega Cab
2014 Flagstaff 832IKBS TT