What do you all use for sleeping bags for your kids? I am planning on taking my 5 year old on a couple trips this year and the crappy 45* rectangle bag isn't going to cut it. I am looking for something in the 20* range since at least one trip will be in the mountains and it is Alaska and the weather changing is almost guaranteed. Thanks. Here's a pic of him from last summer posing in front of the family car camping tent.