first off denver doesn't get that cold in the winter.as compared to the north. it should be around 70 to 80 degrees all winter cept when it snows, but it only has blizzard like snow storms every once in a while. second it may be a good idea to stay off the east side of colfax, but it has been cleaned up alot and most of the punk shows are over there now. as far as squats they're few and far between. there are abbandoned building all along 29th ave. i know if you take the light rail north from the civic center to 29th there are buildings to the left of the station and there is an anarchist collective over there as well. 16th street is the place that the so-called traveling kids chill at and there is ok spange. if your in town ask for lucy's cafe a lot of crusty kids chill there and they know whats going down as far as places to stay. look for a kid named mexi or a kid named dylan at lucy's they should be able to help you out especially if you tell mexi that nate sent you.
peace, good luck and good travels.