I would plan 5 trips on your own. You are pretty fit so you can get it down to 4. Also depends on how much gear you've packed in too. Also on how far in you killed your elk will also be a factor. Drink a ton of water and don't try and pack out the entire thing the first trip you will burn yourself out. With 2 guys you can make it in one trip again depending on how much gear you have. Good luck and defiantly bone out you elk.