No excuses here. I'm 73 now, I'm also 5th generation Colorado and I moved to Montana about 50 years ago. I also killed my first elk when I was 20, but back then the Razor 4 wheeler hadn't been invented, so I did all of my hunting off my hind legs.
I live by myself now, and I can't eat an elk every year, so I no longer need to kill an elk every year, but I have killed 35 elk. This year I'm planning on DIY hunts for pronghorn antelope, deer, and elk here in my now home state of Montana. Also, next week I'm going to Newfoundland, Canada for a combination moose and caribou hunt, and in December I'm going to Kodiak Alaska for a Sitka blackmail deer hunt.
I may be slowing down a little, but I don't plan on quitting any time soon.