RE: montana and wyoming have big game as well!
I assume you know that CO. still gives the highest percentage of tags to residents and it has been that way for, well, for ever I do beleive.I don't remember for sure, but I think residents get 60% of the tags and NR are elegible for the other 40%. So if you're seeing an increase of NRlicense plates in any one area, it's just because some NR have discovered that one little area, but then if that's so, that means there are some other areas with fewer NR license plates.
Two ways that a guy can avoid crowds that comes to my mind. Take up archery and/or get further off of the road.