I don't call in the east, but I do call black bears. If you can use e-callers, Foxpro has some calls for bears.
For hand calls, my very best favorite call is an antler call made by our very own Brad H.
Does a fawn distress that calls bears,deer, and moose. A bear cub distress also works. I've called them with with different distress calls.
I find lots of volume and non stop calling works. You should have some one watching your back door at all times, otherwise it gets western real fast.