I remember one new years eve with 50-100 rv's in local overnight parking lot at ski area. Another presidents weekend with 300 rv's for the buddy warner race going on......15+ weekends a season for 12 or 13 years IIRC. Great way to ski! Did I mention TT license plate was skiht46......ski hut for six! not too mention the 2 alaska malamutes that came for the ride too!
Yes, take off with full tank of water, as you will probably NOT have access. Some area's have electric hookups. If none, have as much battery power as you can afford and carry. Along with a generator. If you use a generator, try to stay away from the electric hook up folks. They can look at you with despise!
Manual drain valves were my headache. As water freezes upward into the drain tee, and you lost water from that point to usually where you wanted it, like toilet in my case! Otherwise no issues with plumbing down to between 0-5F. Heating tanks were not normal in the 90's, so gray and black would freeze up. Usually back in lowlands they would thaw in a day or two so I could dump. Usually got 4-6 days, or 2 weekends out of a tank. So even if it stayed at or below freezing that week, it was not a big deal if I did not empty.
I would use 7-10 gals of LP per friday afternoon to sunday eve, depending upon temps. Two size 31 bats lasted 24-48 hrs depending upon temps, and if my 4 kiddos turned on the AC/DC tv saturday after skiing......
I do not remember the name of the vent covers, but they allowed me to keep them open so there was not as much moisture on the inside, especially windows. Single pains will freeze/frost on colder nights.
We did not have a micro, so we did the cooking with LP stove and oven.
Shower was the storage for ski boots to dry out in.
do NOT put out the awning unless it is sunny out! Also depending upon the snow conditions when snowing, using a slide out can be bad. Especially if you can get 3-5' of heavy wet snow while up at ski area. It may not come back in, or worst yet, literally break! I have not seen later myself, but have heard of one or two. If they have awnings on them, make sure they go in at the same time as slide. or, yes I have seen awnings fall apart with a foot or more of snow on them. Along with you may come downhill as I did one time, getting stuck on the hill with local pass close for 48 hrs, 5+ feet fell down. Usual total was around 15K lbs, hit a scale half way home at 22K lbs due to snow on roof of trailer, and snow in the bed of the truck to roof top level, except where the generator was in the back end......
Have I scared you yet? NO! Better yet.
Have fun, be prepared for some issues that you do not have in the summer per say. If chains are usable in your state(s) you are traveling in, get some for both rear of tow rig, and both tires on trailer. I preferred rear axle if you have a tandem. Front only works too. Here in Washington, chains can be required for towing and rigs over 10K lbs. most of the west coast states in rockies and cascades are this way. Dry fit ahead of time, then use when its bad. I found down hill was the time I was most glad i had them. Especially on the 10+% grade coming down from timberline in 40-60 mph winds, and a road that was a smooth compacted snowy mess. I could stop, no one else could with out chains....4wd is not always your friend for stopping. GOing yes, stopping, nadda!
Marty
92 Navistar dump truck, 7.3L 7 sp, 4.33 gears with a Detroit no spin
2014 Chevy 1500 Dual cab 4x4
92 Red-e-haul 12K equipment trailer