to FiberglassRV, we're glad you're here!
I live 45 minutes away from one of the most fantastic downhill (or snow shoe) areas in the continental US. MT HOOD!
I learned to downhill ski, when "buckle" boots first came out and they were STILL leather. The name Jean-Claude Killy made every snow bunnie between 18-98 y/o SWOON!
So yeah, been at this stuff for a while. However, you're asking about "camping" while skiing? Are you talking about in the "parking lot" of the resort, or some place else?
MY suggestion for a couple of days... is to EXPECT condensation inside, winterize the trailer and take jugs of water for cooking, etc. USE RV antifeeze (diluted) to flush the toilet, etc. Provide baby wipes to everyone inlieu of a shower.
AND HAVE A BLAST! Even if you only do it once, you'll have made a memory!!!!!