I'm not really from N. Denver, but I drive down to SW Loveland from Estes Park to shoot with the Big Thompson Bowhunters. The BTB Big Game Feast kicks off the year on Jan 8 and then the next Sat. is the first 3-D shoot. This is not specifically a traditional club but usually there are lots of trad shooters (sometimes 50% or so). The shoots are once a month Jan-Apr. and then they start once a week shoots until hunting season. The shoots are very informal, fun, and not real competitive. Let me know if you want more details about the big game feast or the directions to the range.