Congrats on being rewarded for your hard work! Im beyond jealous. I once got a pen, with the agencies name on it
A daily run with a 60lb pack sounds like a sure way to ruin your future elk hunt. Ive hunted/backpacked out West for a solid decade and not once can I ever remember running with a 60lb pack.
If your lung capacity is solid and your baseline fitness is above average, then the only thing IMO to combat elevation is time and hydration. Take your time, acclimate and drink plenty of fluids. Ive hit a few 12-14k peaks before and everyone one of them has been tough, you simply don't have enough air to suck. But, I took my time and allowed a couple days to acclimate before I "pushed" it.
Just last month we were in WY at 10k, my wife had a horrible elevation headache for the first day. First time its ever hit her, you just never know.
60lbs on your back is A LOT, especially with a subpar pack. I have a quality pack and Ive loaded it down a few times, North of 70lbs, and it sucks. Im normally below 50lbs packing in for overnight hunts/trips.
Whatever you do make sure to keep us in the loop. I love these adventures!