In which RV? (You might consider creating a signature with that information so folks don't have to ask.) If it's a model with a bed slide, you might have issues with clearance when the slide is brought in. The other issue would be headroom.
Forum hint: You can use "Reply With Quote" (to the right of "Reply") as I have here and folks will know whom you are addressing. If there are several people involved in the thread, it can also help avoid confusion.