I’d still hunt the ridge. Using the mobile or makeshift ground blinds is not a bad idea at all. Quietly and slowly walk through the target area and then periodically crouch or sit and wait for movement or animal sounds. If you have seen that many bears in a short time I think it will work out for you. Especially since it is a hard area to get access to. That’s one of the reasons the bears are probably there. Besides using the trees for a scratching post and to chew on. 😆
I have never hunted bears any other way besides on the ground. Getting the last few yards to the bear seems to be the hardest part sometimes. Depending on the terrain and how loud the foliage is on the ground as well as the wind. Sometimes waiting to see if the bear will come near you is a good idea too.