We picked up our Outback from our dealer last Monday (warranty repair). I noticed all the new campers in the lot and they all had their slides out with piles of snow on top of them. When I was hitching my camper up, I asked the service guy (he's the manager) about those new campers with the slides out and all that snow. He said they never pull the slides in, Summer or Winter, and it's never hurt a single camper. Then he said, "But we've never had a winter like this either. We'll see once it thaws!" (This was Central Eastern Indiana).