My Chevrolet Express van Class B- camper

I have flexi leashes hooked to the side door handle so my little dogs harnesses get hooked up before I open the door. I have trained them that open door DOES NOT mean they can leap until they are hooked up and I give them the out command. I can also unhook the flexis and move them to zip tie loops on the outside as well, or, for taking them for walks. A washing systems is often needed for show dogs because the first thing many of them do when traveling is get the runs and dirty their culottes.