Going to Colorado early would be a smart ploy indeed, if they could,they should. I don't think it's that big a deal with time difference,it's at max 3 hours,rather easy to adjust and who really know what time they will be scheduled to play anyways. The way the NHL does things,it's always to the benefit to the US market,but we'll see.
The temperature has no bearing does it? The arena I'm sure is fine as is the hotel they are staying in which I believe is connected to the arena, therefore no need to even go outdoors.
Beats playing in Montreal where the Habs are spent driving to the game with the atrocious roads and traffic.