Kind of depends on when and where your fishing. Last year I found the Partridge and Orange, Partridge and Green in size 12 and 14 to work well. Bailley's spiders in black, orange and yellow work very nicely tied on a size 14 dry fly hook. The Bailley's Black is my avatar. All three use the thread color for the body and a starling feather palmered halfway down the body. Jim Slattery's Triple Threat Caddis is also a great Montana wet fly. Tying instructions are here http://www.flyanglersonline.com/flytying/fotw2/091304fotw.php .