Bobby,
I have hunted 410 quite a bit, although i haven't in the last 5 years or so, i talked to a bowhunter who shot a nice bull last year, he said the elk have been sticking pretty close to the missouri for as dry as it's been, he shot his out on a dry island, the old river channel on one side had dried up. I allways bumped into elk around chain buttes, and the area around drag creek reservoir.