You got a really good idea here i would continue to play around with what might work best, wood,stone,moss are my thoughts, braids aren't doing it for me but some like it, if you are trying to project a female look to your bear i guess that would be the way to do it.
Maybe one row of braids down the back might work and make sense as how their hair works. (so a bridge of braid between to sides of stone slabs and the braids are the "crater" between the two mountains.)