If I was to hunt from a ground blind for antelope, should I have it set up well in advance? I'll be in Wyoming in a couple weeks and was curious if they shy away from one for awhile like the deer here in Indiana do. Thanks

The majority of the time, yes, they shy away, or stay farther out for a longer shot.  But, if you're only there for a limited time, I'd hunt!!!

If its a real brushy area with lots of sagebrush you might have better luck with a ghilli suit or leafy sage camo. Just cut some brush and brush yourself in by a water hole if the terrain will allow it. If not the blind is worth a try anyways.

I have killed them hours after setting up a double bull.  Having time for them to get used to it is nice but not necessary.  Good luck!