Week before last there was one black bear that showed up at the hatchery on Anchor Point in Valdez a couple of evenings between 7 and 10pm. Not every day and not on any kind of schedule.
I would call the ranger Station at Hyder to check on what is going on there.
We had more luck in Denali this year than anywhere else.
If you are just wanting bear pics the one place where you can drive and you are guaranteed to get them would be the Alaskan Wildlife Conservation Center on the Seward Highway about a mile before the Whittier turn off. They have black and brown bears, caribou, bison, musk ox, lynx, and a three legged porcupine, plus a lot of other critters too!
Good luck and hope you get lots of good pics!