New to the hammock hanging thing and need help with a decision. I currently have a 45* down bag which I know will not be warm enough for hanging. I trip from may to sept with a temp range of 20* to 90* in the Boundary Waters Canoe area. Received some money for my birthday so what will be my best bang for the buck? Investing in an underquilt and using the 45* bag as a top quilt or a new lower rated sleeping bag, been looking at the Exped Dreamwalker, and using a therma rest pad that I have. Thanks for all info.