I'm sure you know these things but I'll rattle them off anyway just in case. Here's a few that come to mind. Its been about 4 years since I've went so I know I'm missing allot of things that I would normally take.

Dehydrated food and drink, light for packing.
Excellent boots, ones your comfortable wearing. Make sure they are broke in before going up the mountains. Maybe even an extra pair of boots.
Compass.
Whistle if you get lost.
Maps of the area your hunting.
Binocs
Small First Aid kit (blister stuff for your feet)
Fire Sticks in case its wet
Small back pack for hunting
Cow calls
Spike calls
Bugle Pipe of some sort and call (whatever elk calls you desire)
Camera
Extra bow or limbs if you have a take down
Extra string, tab/glove, your basic archery essentials that you will need.
Knife
Watch
Some kind of blanket of some sort in case you get stranded in the mountains over night. I can't remember what its called.
Sleeping bag- Warm one
Tracking tape for marking on blood trail
Solar shower
Non scented soap and non scented deodorant of some kind.
Hunting clothes and regular clothes

I'll add to the list when I remember more. Your one lucky dog there Chad!! I miss my elk hunting allot!!!!!!!! Money hasn't allowed me to go for about 4 years now. I've never connected on one yet but I sure love trying to.

Good luck out there and be safe.