Hello Bryan and Judy,
Our first outing saw us place a lot of duct tape on one of our propane doors. The problem and fix is actually very simple. The way I fixed it was to remove the latches and turn them over. Gravity is at play here as well as vibration and wind. The original installation allowed all those forces to work the latch open. By turning them around all those forces now work to keep the latches closed. This may sound hard but when you look at the way they are installed you'll see what I mean.
We no longer have to use duct tape on them! But we still carry a couple of rolls of that good stuff! Don't leave home without it!
Happy travels....
HamRad