We just returned from 5 nights in Grand Canyon, I stayed in Trailer Village while DH backpacked for 4 of those nights. This was the 4th time I've been to the Canyon during the same week in Nov. and the coldest temps as well as the first time it snowed. Since I had power (the reason we'd opted for Trailer Village instead of Mather CG) I stayed nice and warm, with PUGs, Gizmos new bunk end liners, electric mattress pad, space heater and furnace. Here's a pic: Packing up took a lot longer than usual, due to dealing with icy patches around the pup, ice on the Gizmos, the door mat was frozen into the mud, etc. etc.