If your guide does not feel comfortable...or doesn't know how to skin them down the back, just cut from the base of the skull down to the base of the tail. Next cut the tail bone close to the carcass and then start skinning the bear.
Once you get to the legs just take your time and work the skin off down to the "wrists" where you can just cut through the wrist joint...leaving the bones in the paws.
Once you have the majority of the hide removed....just skin up the neck and remove the head near the base of the skull.
THE MORE I THINK ABOUT IT....MAYBE YOU SHOULD JUST TAKE ME WITH YOU