We get this one a lot!  But you needn’t worry about bathroom breaks.  We make a stop for coffee and doughnuts early into every tour, usually at a roadside rest-area, and always conveniently located near a restroom.  We make regular pit stops through the day, and our drivers brag that they know every public restroom in the American Southwest.  Ask any Kindred Traveler and they’ll say that they all had concerns about bathroom breaks heading into their first tour that were quickly forgotten.