I've got two large dogs, 85 lbs Husky and 100 lbs or so Malamute. The Husky will sleep inside if we allow it, which we generally don't, but will also be content sleeping outside teathered with a sleeping pad. So he is usually tied to a tree near the camper or more often up in the bed of the truck. The Malamute refuses to sleep inside a tent, crate or dog house. She prefers the outside no matter what the conditions and won't sleep on a pad either. No matter how much snow we get I usually see a spot melted to the grass where she spent the night. The colder the better for her. While I love my dogs to me they are still dogs and are at the bottom of the family food chain. They spend about 70/30 time outside/inside and are conditioned to that and they enjoy that. Therefore when camping they just stay outside. We are not ones to let a dog sleep in the same bed as us whether camping or at home. Just the way I was raised and have always been. Yes I've taken some heat for that but I don't think there is anything wrong with our philosophy. It all comes down to what you/your dogs prefer and what your dogs can handle. If they are an inside dog keep them in an enclosed place with some warmth. If they are dogs like mine that can with stand and prefer the outside/elements then keep them outside.