I've hunted in 73 the last three years. Last fall they herded up early because of the big snow we had in Oct. They were also really spooky. I would stop to glass a herd 2 miles away and they would be moving out before I could get the scope on em. Casper is the closest place to get all the stuff you need. There are quite a few roads in the unit, but as you probably know, watch the weather report because if it even drizzles they suck. There's a blacktop road going right through the middle in case it gets wet and you can almost always see antelope along this road. Trophy quality seems to have gone down, last year after glassing over a couple hundred I only saw two that looked pretty good. I heard they dropped tag numbers significantly in the units around Casper this year. PM me if you have any other questions.