That Prevost was most likely me! We used to spend a lot of overnights at Wal-Mart's across the Country. We would get in late (after 5pm usually) and we were out usually by 9am the next morning. There are a couple of apps that show which Wal-Mart's allow over night parking but I also use RV Parky as mentioned above. I believe AllStays has a similar app for Wal-Mart. Just so you don't have to keep bouncing from one to another when you find a "No overnight Parking" sign, it's worth having some app available or make a call to the store where you plan to overnight.