Yup, you guys hit it on the noggin - cactus! Great stuff.
YorkArcher, speed goats are the funnest of the fun. I've hunted all you mention except caribou. Antelope hunts aren't necessarily hot; I've hunted them at the beginning of October in the snow and at the start of last September I almost froze to death in a blind on the first day. So you never know, but it really is a ball.