Hey Mike,
Good observation, but he had it covered. He has one of those new porta potty's that have the disposables bags attached. It's stored in a vinal zippered cover, in gray of course.
He didn't want any kind of permanent bath equipment installed because he didn't want the lingering odor that always shows up with RV toilets.
When traveling he is never far from a campground or truck stop when needing showers or time to just sit and meditate.
Thank for looking.