The Snake is starting to fish pretty well as the cutthroats are starting to feed on the surface. The standard chernobyl with a dropper has been working well. For the chernobyl, try a tan or gold in sizes 10 or 12. For the dropper, try a size 14 red copper john or pheasant tail flashback. PMDs are hatching sporatically and various PMD patterns have also been working pretty well.
If you are floating Moose to Wilson or Wilson to South Park, it might be worth taking the time to get out of the boat and fish some side channels. You can certainly catch fish on the main channel, but the dry fly action seems to be more productive when fishing riffles and slow water along the banks of some of the side channels.