But newcomers especially should be aware of things passengers can't do while an RV is being driven, and these rules differ between states. While a trip across the country can certainly be more convenient when you're toting a kitchen, bed, and bathroom along with you, RV travel also requires some planning. Fortunately, at select Costco locations, you can secure a spot in their parking lot for the night. In fact, in some cases, the decision isn't even Costco's, as some city ordinances won't allow overnight RV camping in retail parking lots. You'll also want to be familiar with any rules Costco has for overnight RV stays.