All good advice so far. Make sure everyone is prepared to put some miles on their boots, and get away from roads and trailheads if they want to be in elk. And make sure they're prepared to take apart an elk and pack out their meat a few miles with multiple trips. I've run into guys who have an animal down and aren't prepared, headed into town to look for someone with horses, you don't want to be "that guy."
And since they're whitetail hunters, impress upon them the differences between hunting elk and hunting whitetails, so they can understand why they need to adjust their tactics. It's not good enough to look for sign and set up, they need to keep moving until they find animals. A place can be eaten up with fresh sign and deer hunters will tend to want to set up and wait for elk to come to them but they need to know that elk range over much larger areas than whitetails, and they could be miles away from fresh sign.
And, good luck!!
