After my RV's door latch failed (the mechanism that retrieves the latch broke so I couldn't open it from the inside or the outside), I was glad I had a class C so I could just use the chassis door to get in. If I were out in the wilderness in a single door RV, I'd have had to break a window to get in, and even that's not trivial without a ladder or something to climb in the window, I guess maybe climbing the ladder to the roof and tearing open the roof vent over the bunk would be a better option.
It was relatively easy to unscrew the lock from the inside and force the latch open with a screwdriver.