Well then I'll have to recommend 31. Don't screw up my odds! I apply for 30 because a buddy of mine drew it a couple of years ago and had a good hunt. I wish I knew a good unit that I'd have a better chance of drawing. Just don't want to waste my points on a so-so unit.
To be honest, I live in Rock Springs and have been to both areas. I have seen more Elk in 31 than 30 and its easier to get on top of little mountain (area 31) than pine mountain (area 30). Just my opinion though. I really like area 31. Last year I went down there 4 times and didn't even have a license. I just love seeing all the deer and elk everywhere.