ESP,
I have not hunted that area, but I lived in Cheyenne for a few years and used to hunt rock chucks in the Snowy Range nearly every weekend when snow allowed. There is quite a bit of private land in the lower areas and much of the public land gets quite a bit of pressure because it is close to Cheyenne and Laramie.
Personally I like the area around Pinedale better. You can get into some good hunting on your own. You just have to stay out of the wilderness areas because of the stupid law that states you need a guide or resident with you to hunt them.
Dave