When's the next bathroom stop?

A van or bus load of people have a lot of differing ideas on how long is too long between potty breaks. It doesn't help the situation when it has been raining all week, and every body of water you encounter is flowing rapidly, sending subconscious messages to your brain: "gotta pee, gotta pee, gotta pee RIGHT NOW!"

falls below the grist mill,
Babcock State Park

Kanawha Falls

waterfall on SR 60,
between Hawks Nest and Gauley Bridge

babbling brook,
somewhere in West Virginia