Tightening the screws worked for a while, until it didn't. Sometime while coming home from the Tehachapi show on June 23rd, it fell off the hinges and onto the floor. I was quite surprised when I opened the door to unload my stuff to find it laying there. The door actually came off the wall cleanly, without damage, so I just left it there while I went to the Hansen Dam Show on June 30.
However, I am going to two, 2-day shows this month that require two overnights each time. Living with a door on the floor is just not an option. I called up my local Camping World and scheduled an appointment for a door rehanging. While I was there I also had my propane tank topped off which made the visit a little more productive.
I didn't know how wobbly the door was until it wasn't. When I checked out the repair, I gave a girly squeal of delight. The door no longer needs to be lifted to open, and it swings perfectly. For $130 and some change, you too can have a functioning bathroom door! Thank you, Camping World.