Hi all. This will be my first backpacking trip to SD in late October. To save some money I am wondering about pairing a cheaper bag with a woobie. The woobie seems very versatile and something I could use during day trips as well while glassing. Night time temps will be in the high teens or 20's. What degree synthetic bag would you all recommend to keep me warm during those temps with a woobie inside it? I understand the lower degree and generally the higher price the better. Would a Walmart 30-40 deg bag work with this concept? Thanks!