Peter: I fish mostly tiny streams with native Cutthroat popns., in streams that are often domed with Alders and Willows. I have shortened my leaders to as much as 30-some-inches, to enable me to Bow-and-Arrow cast to the stream, get a drift down, then--and this is the most important part--set the hook. The very short leader enables me to still have fly line out my rod tip, then set the hook without my rod first hitting an overhanging branch. Most of these trips are far in the backcountry, so I just pack some leader material and tie the leader I need when I get to the stream. My most common leader is about 20" of 2x, then about 15" of 4x. Since you don't really need to turn a fly over that you are sending downstream, you don't need the traditional fat butt section. The longer and thinner you make the last section, the more it will bend around with current. I vary this idea a bunch, depending on the size and character of the stream I'm on.
This may or may not help with your waters, but it works for mine. Hope it helps, or at least entertains you!
http://i713.photobucket.com/albums/w...gBeaverCrk.jpg
Fishing Beaver Creek in Utah, for Greenback Cutthroat, with a 30-inch leader.
Zac