Hello, Eric! You may want to double-shot Yellowstone, as May there is tremendous. In September, the elk rut is best shot in Rocky Mountain NP in Colorado. Glacier is best visited between July 15v and September 15, as the Going To The Sun Road is only open during that brief interval, aand you'll need that road open to get up to Logan Pass, where you can find habituated mountain goats, bighorn sheep, and ptarmigan. Goat Lick down on the southern edge of Glacier NP is also great for goats in April and May. Don't miss South Dakota's Custer State Park - it is arguable the country's best place to photograph bison and pronghorn, and offers great opportunities for prarie dogs and whitetail deer, as well. Of course, if you're leaving in April and have a long lens, you may want to go straight to Klamath Falls. The Lower Klamath Basin lies over the Oregon/California border, and is perhaps the finest place in the nation for photographing waterfowl, partiucularly wild ducks and geese. The places to go there are the Lower Klamath and Tulelake National Wildlife Refuges. Each of these refuges have wonderful auto tour routes, as well as photography blinds. Good luck - sounds like the most fun year a person could possibly have! -Tom
"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".