One tip I can add in terms of clothing. If you stand around, then it is advisable to dress as if the temperatures are 30 degrees colder than expected. I do astrophotography and where warm clothing using the layering technique. As I move around, I can remove things to help with the balance of ambient temps and body temps. If the weather is wet, the layering helps to ward off that damp penetrating cold. Gortex will only get you so far when wet snow is your challenge. A light rain jacket over the Gortex will keep you dry for very long periods of time and you can "layer down" as the need arises. Take care, Gregory david Stempel FIREFRAMEi m a g i n g
