we use walmart, other big parking lots and rest areas.
we have to put 2 of our 3 slides out 1/2 way to make the inside work well.
never had a problem.
just ask the manager, you will run into no problems I am sure.
MANY use places to stop just while wanting a few hours rest before driving again to their destination. a cg is not required for a 4-5 hr rest stop and get on your way. especially if you stop in the wee hours of night. after all you got a home on wheels and it is meant to have the freedom and options of stopping anywhere you are permitted so you can travel how you want. that is one of the reasons we bought our rv. freedom to do what we want.
we sure don't live by other campers rules they find acceptable. no way.
