I don't think you need a drop camp just for black bear. The Chugach State Park has a ton of black bears right behind Anchorage and would be as good a spot as any to go to. Take any of the trails up from the Seward highway and you will be in decent bear country. I've seen lots of black bears up most every trail including Bird Ridge, Indian, Crow Creek, Eagle River and many above Eklutna Lake. Eklutna is an archery only area but pretty much everywhere else around there is open to rifle.