Make sure you have got it figured out HOW you are going to get to and from where you need to be (elk hunting spot versus camp) IN THE DARK BOTH WAYS! Get up much earlier than you need to, resign yourself to sleep deprivation, cowboy up, and just go do it. Be "on stand" per your scouting results an hour before sunrise.

Know which shots you can and cannot take per your earlier choice of rifle/cartridge and STAY TRUE to your limitations. When it is showtime don't delay pulling the trigger and after the first shot, keep shooting until it is down and out -- no sitting there admiring your first shot handiwork waiting for the elk to crumple -- they may choose to just keep on going. They for sure are NOT deer.

EKM