I end up mostly dry fly fishing with my Tenkara rods here in Colorado in the summer unless I am fishing a tail water where I know it just not going to work. I just find the thrill of a surface take from a trout a lot more exciting than catching a trout subsurface and for me I have a hard time understanding why you wouldn't fish a dry fly during a good hatch. It always cracks me up when I am catching fish left and right on the surface in the middle of a caddis hatch while I see other fly fisherman with their traditional gear having little or no luck with their indicator (bobber) nymphing setups.
One technique I have found that is very effective with dry flies on a Tenkara rod is to use a two dry fly setup. I tie a slightly more visible or bigger lead fly such a a small hopper or larger caddis and then attach a second smaller point dry fly to the bend of the hook. The extra tippet between the two dries helps that second fly achieve a much better drift and I can still twitch the rod to manipulate the point fly as I want.
The most effective technique for me this summer so far, at least during Caddis hatches, has not been the dead drift though but instead skittering the flies across the surface. I dead drift my two fly setup past a likely holding spot and if I don't get a hit I start lifting the fly of the surface at the end of the drift as it passes the spot I want to fish. With the long length of the tenkara rod its very easy to effectively bounce the fly along the surface of the water. This has given me some very aggressive takes and seems irresistible to fish during a hatch.
The brown trout below I caught on the Roaring Fork river here in Colorado using my Amago and a two dry fly setup. Both flies were CDC & ELK Caddis imitations and this particular fish jumped completely out of the water to catch the fly in mid air while I was skittering it across the surface.
