We have a period in September and October that is the time for cast and blast. It was a good year this year and and a fairly long season, the later it gets the higher probability for weather. Which can be good or bad.
Call these Guys they are based here in Bozeman MT and offer this type of thing.
Yellow Dog Fly Fishing
They have lots of packages. Just tell them what you want. (They are good all over the world)
Grouse & Partridge Open Sept 1
Pheasants Open October 11 This year.
October 4 for ducks this year