Replying to Fly Fishin'

So there are obviously lots of bass/walleye/etc anglers in here fishin with baitcasters and spinners.  Anyone strictly fly fish?  I live in Fort Collins, which gives you the unique opportunity to fish for both warm and cold water species all within an hour drive or so.  I just try to catch everything on my fly rod, from carp to grayling. 

Anyways, dry fly fishin is ON right now in the mountains, but what i really wanna know is if i can catch bass this fall on a worm simulation type fly.  anyone have any ideas?