Slightly off the subject, I am also planning to take my future rig to sleep in at the ski resort. Do they permit overnight parking in your area? Apparently Mammoth Mountain DOEST NOT!
We ski at Crystal Mt. in Washington. They not only allow it they encourage it. They offer electric hookups for 20$ per night and non electrc is 10. Over the new years holiday there was at least 130 rigs that were camped. Up in Canada at Whistler there is a camp ground with full hookups for 50$ per night. Compare that to the hotels that start at 150$ per night and you can justify that trailer purchase in no time