You can stay close to the road, along the madison river out of west yellowstone clear to madison junction. That area will offer lots of good elk shooting, if you can find a spot among all the 500 and 600 mm canons . . . be prepared for a very chaotic encounter with masses of head strong photographers. Also, prepare yourself for follow the rules of the park there will be people who will jump down your back if they think youre too close, even if youre not.

I'm not saying this to discourage you I'm telling you this so you'll be mentally prepared. . .

Good luck and post few when you get back. . .