We just went on our first trip with bikes. I ended up purchasing this: Racor PBS-2R Two-Bike Floor Bike Stand
Put that in the isle way, Used a bungee strap on the front tire to the rack and it stayed in place.
Seemed to work pretty well. Just takes a few minutes to un-do and take bikes out to get to whatever you need.
Or if you are nimble you can jump over the bikes with ninja like skills to get to whatever you need in the front of the camper. -- Like I had to do twice. In the same day. Within the same hour.