On the Snake, the cuttys are consistently feeding on the surface. We have seen good PMD and various caddis hatches. The hoppers are also out all over the banks. As usual, chernobyls have been working well, and you can always add a nymph dropper to effectively fish above and below the surface. Various PMD and caddis patterns will also pick up fish. On cloudy days, a chernobyl or smaller dries will be your best bet. On hotter sunny afternoons, try a hopper pattern. We have seen a lot of larger fish come up for the hopper.
On the South Fork, the dry fly action is finally coming around. It has still be a little slow on dries in the middle of the day, but the early mornings and the late afternoon/evening has been red hot. Various mayflies (most prominently PMDs) have been very effective. Hopper patterns have been a little hit or miss, but we have seen some really big fish sporadically taking hoppers on the surface.