A couple of years ago I helped a friend put vinyl planking in his RV and about a year later, it shrunk from end to end and left gaps. He got a good expensive grade from Home Depot that self-adheres where it overlaps on the sides and ends. The sides did good and are still nice and tight but the ends look awful. I've seen similar flooring in other RV's that shrunk in the same manner.
One of these days, I'm gonna rip out all that blasted carpet in my Discovery and go with wood but I'm going to use a snap-together floating laminate like Pergo. I've done a trailer with it and a motorhome and both went well but I can see some difficult areas in mine. Like the step recess, the humps where the front seats mount, how to get it under the slide without it moving around, whether to transition to the existing white wood tiles in the kitchen or pull them up, and finally, how to get it to follow a rising angle up in front of the driver's seat. Oh, the occasional bolt head that my bare feet can feel under the carpet here and there.