I've seen a very few during the early archery, muzzleloader, and general deer seasons in the Snake River breaks (unit 142), but if you look at the harvest statistics, unit 130 is the clear winner in total numbers and success rates. That doesn't guarantee anything, but it does say there are probably more elk in that unit than the others. I know 130 is near Turnbull and there are several adjacent landowners who charge a good bit to hunt, so that probably skews the numbers some, but if you could put in the miles and hours scouting, you may come up with an area to try anyway. It also may open up some good deer hunting too. The elk in all of the late eastern muzzleloader units are pretty scattered and move around a good bit too, so I'd probably gravitate to where the most elk are and scout from there. I know that's not a lot of help, but at least it may cut down the area a bit. Good luck.
Dave