AFAIK, Bass Pro Shops will also allow O/N stays. As a courtesy, if the place is open, double-check with the on-duty manager before hand. I know that our city has a "no overnight" ordinance, so it's a cr@p shoot. I've heard people who have said that, if the cops hassled them, they just ask if they'd rather have them stop for a few hours in this parking lot, along a street or driving around dog-tired and run the risk of an accident. Others have said, "we have a breakdown and need supplies", when parked at a WM. :B
Lyle