Overcrowded!!! Most of the rivers are very touristy. I didn't enjoy Montana, Colorado or Wyoming (Jackson Hole...I'd shoot myself in the foot before I tried to fish there again) fishing that much. The off season's a little better, as far as crowds are concerned. I didn't find the fishing to be that different from southern Alberta. The main stems of the rivers may be a little bigger but that's about it. The fish...cutts, cuttbows, browns, bows, whitefish...no bulls. There's some nice grayling lakes up really high in the mountains too. There are a lot of "guides" in Montana, Wyoming and Colorado as well. They tend to think they own the water and its only there for their use and that of their clients. If you're looking for world class fishing, go to Idaho...just stay off of Henry's Fork (crowds like you wouldn't believe).
James