We never had a problem in a Walmart other than the lot sweepers at 1am. I did have a problem with a MH owner in a very nice rig. We were putting on a car show with Walmart for Breast Cancer Awareness and the guy was parked in the middle of the show area. At 8AM I knocked on his door and asked him to please move around back as we were having a lot of cars coming in already and the Walmart manager was with me. He said he would when he was ready so I let it go. 9 AM he is still there and would not move until he had a little more sleep. I parked show cars in front and behind him and Pro Comp drag cars beside him and he complained about the noise! we started the cars for the crowd about every half hour and moved everything when the show ended at 6PM. Well, I tried to be nice to start with. Guess he thought he was entitled to the space.