I tanned my own black bear rug a couple of years ago. I used the Lutan-F tanning kit from Van Dykes taxidermy supplies. My rug turned out nice IMHO for a first-time tanner. A bear skin is probably one of the hardest hides to tan successfully. As others have mentioned start out small (squirrels, rabbits, coons, etc) & work your way up to bigger skins. Preparation is key to gaining a good result. Skins have to be fleshed properly to remove all fat & skin before tanning. Follow the directions that come with the kit closely. Don't let people scare you off, tanning is NOT difficult if you take the time to prepare the hide, & follow directions.
George