About to go hunt turkey in NW OK next week for five days, gonna be bivying out of an REI minimalist bivy, North Face Dolomite 2S bag (40*), and a small Thermarest Prolite Pad. I've only tried this set up in my back yard, and even then the temps only got into the low 50's, the problem is I'm having a lot of condensation in the bivy buildup. The bivy has 6 zippers that I can use to vent along with the screen for my face that I can retract, how do I set up those zippers so that I can vent properly? A little condensation doesn't really seem like a big deal, but I'd eventually like to pick up the Kelty Cosmic Down 21, and if I have to worry about condensation I may reconsider.