The guys above have given good insight and I won't repeat but I have a little story. My first elk(5x5) was on such a hunt up near Red River Idaho. I just picked an area where I knew had some elk and I packed in about three miles. I made two trips to get myself all set up with tent and food. before I went in I met some ranchers who had horses at the trailhead and I struck up a good conversation with them. The evening before opener I was sitting in my camp which was off the trail a ways and heard the elk bugling. The next morning I headed in the direction I had heard the bugling and found a lot of sign but no elk. The next day I headed back into the same area cow calling as I stalked thru the woods. The next thing I knew I had cows calling back to me and then a bugle. He came in and I got my shot. After I walked up to him and let out a yelp of joy it hit me. Now, up to that point I had only killed whitetails and some good sized ones. But standing over this elk was like having 4 big whitetails on the ground and three miles away from my truck. I was a little intimidated. I field dressed him and quartered him (It wasn't easy). I took off with the first load. It was well after dark and and everyone camped at the trailhead were asleep. Carrying the first load was a job and I was worried about being able to get the rest of the elk out O.K. Luckily it was pretty cold so I wasn't to concerned about the meat spoiling in the woods. I figured it would have taken at least two full days to get the meat out and I was worried about leaving all the meat in the back of my truck. Even though it was cold outside the sun beating down on the truck my meat probably would have spoiled and I was to far from town to make multiple trips to the locker. That's when I got smart and went over to the guys with the horses and just about begged for mercy. They had pitty on me and they wanted to help a fellow hunter. It took three of us and two horses six hours to go in and get my elk out. They said in order to pay them back, help another hunter some day. I did give them a bunch of beer money. I would have gotten that elk out one way or the other but they sure helped. I did have to make two trips in to get my camp out and that took half the day. Now I own horses and someday maybe I can repay them the way they asked. Before I bought the horses though I did more do it yourself hunts but was more careful how far from the truck I got. We owe it to the animals to make sure we can get the meat out. You mentioned grizzlies. Think twice about hunting alone in Griz country. Remember how long you'll have that elk on the ground. I seem to like testing the Darwin theory and have killed several elk in Griz country alone but it's not too smart and I don't recommend it.

I've been real lucky on my do it yourself hunts and all of the animals I've taken are trophies because of the way I did it. Good Luck.