If you drove the Mud Flat Road/Juniper Mountain road from Bruneau/Grandview all the way to Jordan Valley, then you drove through some beautiful country, and even right along the edge of some wilderness, but if you were to pull out a map, you would realize that there are backroads that literally go 40-50 miles of off-road 4x4 roads, through multiple wilderness areas, huge deep canyonlands toward the rivers to the south, long stretches of high dessert in the Battle Creek area to the south, Antelelope Ridge/Triangle to the North, thick juniper forests and mountain areas around Juniper Mountain, aspen groves and high country timber around South Mountain etc.
I can tell you that you will find deer where you wouldn't think you would find deer, and certainly you see elk everywhere even when you think it's not 'elk country'. I've seen huge bulls rutting right off the mud flat road near Deep Creek.
Keep in mind the mud flat road in the main artery. If you think about it for a second, why would any nice animals be living right next to the road, when they have been experiences hunting pressure since mid August (archery antelope, archery deer, bird seasons, early elk, etc). Although, I will tell you around Juniper Mountain you can sometimes see deer right off the mud flat road.
ALl of this is to tell you that people like me have spent months of time in this area, but you have to get onto the 4x4 roads to explore and find the honey holes.