April sucks around here, except for steelhead, which I don't think is
what you're looking for. September is probably the best month of the
year, but the really good fishing requires either a raft trip, or a very
strong pair of legs, or a horse. Or an airplane or a helicopter.

If I might make a suggestion, Larry, it's something I've been meaning to
do but haven't got around to -- chasing the Spring salmonfly hatches
around the Northern Rockies. You'd have to be very flexible about your
travel plans, because the hatches and conditions are so unpredictable,
but it could be a great adventure.

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Cut "to the chase" for my email address.