We've done quite a few 1st season drop camps (going again this year). 0 degree is the way to go. The first year I went I used one of those light weight 10 degree, overly expensive, high speed backpacking mummy type bag. Every time I rolled over I was getting twisted up. The next year I bought a 0 degree over sized flannel lined bag and haven't looked back. It gives me room to roll around, I can keep some clothes in the bag with me so they're not so cold to put on when its early in the morning, and i can get dressed while still in my bag. If you're doing a drop camp and getting packed in by horse, weight isn't that much of as an issue. Be comfortable if you can be, drop camp hunting and backpack hunting are two different ball games.