you should go to your local sporting goods /gun store and ask around, someone should have some info and your bound to run across some die hard elk hunters. might want to try the rocky mountain elk foundation, their office is in missoula, not sure what info they could provide but may be able to point you in the right direction.
i'm not framiliar with the fort peck area but would suspect if you are going late in the season it would be pretty much froze up.
is that a draw permit, only asking because there is allot of national forest between helena and missoula/great falls with good elk populations, you use to also be able to hunt seban ranch right outside of helena.
i'm not shy about hunting an area, get up there poke around and hopefully you'll see some sign, if not move on and cover as much ground as you can because they run around allot depending on the weather and hunting pressure. from my experience you gotta look harder for the elk but when you find them it's no different than blasting a deer, all the same hunting principles apply. if you come on a big herd place your shot carefully because they will bunch up and it's really easy to shoot the wrong one or get a pass through and end up with 2.
and most importantly before you pull the trigger think really hard about how bad you want it because you gotta carry it out.
when you get there stop by the local bar, you should be able to find out the areas where people are having some luck.
good luck, let us know how it goes.