Alrighty, I know this is a dumb question. We're planning to go out during the week of the 4th. We didn't prepare ahead of time so I'm assuming most RV parks are full, and besides, we wanted to take our time and not stick to a schedule. So question is, how do we easily locate places to dump. We're probably going to have to park at Walmarts, Flying Js, or rest stops, so if we do "dry camping" (I suppose that's the definition of it...if not forgive me, very novice at this) how do you find places to dump without having to call or drive all around a town? Thanks for your help!