Hunted the Flattops Wilderness area 3 season in archery. Elk all over, but when on the edges of the wilderness, at sundown from high points you'd see many headlights of atvs heading out for the night. Not a lot of deer in Sept. but some really good bucks. Get used to altitude, we were at 13K+ on the last hunt. We hunted both sides of the South Fork of the White river. The area out of Budges resort had tons of elk, good trails for hiking.
Good luck.