I am backpacking in southern Utah at the beginning of April. Night time temps can drop into the low 20's. I have an EE revelation 20 and a Thermarest Xtherm pad. Im a cold sleeper. Last night it got down to 35 on and over night weekend trip but I am not sure how well the quilt will do in the low 20's. I was wondering which would be better. A sea to summit reactor or a sol escape bivy to put the pad and quilt in. IM not to worried about condensation. will keep my face out of the bivy. They both weigh 8 oz