yeah, 100 is the sand dunes area north of I80 from RS to wamsutter....great area.....good bulls but not easy hunting. NO timber, lots of deep canyons and open sagebrush. be ready to shoot long distances........lot of people road hunting. hunted it last year with a buddy, he shot a 320 class bull. we saw bigger on the first day but he was holding out for a 370-80 class bull, never did see one. did see several 350's shot. there are 370's out there, but good luck finding them, then getting a shot. try to find the areas where there are no hunters or low numbers.....you will see when you get out here most people congregate around steamboat mountain. big area, so you can get away from most hunters, but you will need some help finding the out of the way areas.
an atv would really help you cover country....just a little tip. give yourself as much time as you can, it is a very very large area and you will need as much time to cover it all and find the elk you want. you will find elk fairly easy, its the big one that could take time. good luck to you, pm if you would like to chat.