I've went on two archery antelope hunts. I didn't recover my first one before the coyotes got to it and the second year my group went 4 for 4. All have been spot and stalk (or spot, stalk, and wait behind cover).
I personally do not believe it is as hard as what most say. I was expecting it to be almost impossible to get close. Terrain is your biggest friend. Always have something in-between you and the antelope while stalking. 75% of the time the antelope will see you before you shoot. But usually they give you enough time to range, draw, and shoot. However, expect a lot encounters to be far, 60 yards plus.
Decoying can be good. Definitely bring one with if you're hunting the rut. We've had some success having them close the distance and sometimes even within 30 yards. However, they can spook while drawing back. Most of the time they close the distance to 80 yards and don't go any further. In the future, this is when I would try using a buck call.
Although not in Wyoming, we've had the place to ourselves during bow season. You should be seeing a lot of antelope and getting multiple chances each day. It's more of a numbers game before everything falls just right. Everyone will have a ton of fun!