I would go back as we saw very little of it last year. Scenery wise it was ok, alot more wide open areas than Blk Mnt. Camping is strictly primative, no facilities at all. Closest place for stores would be Pineville about 8-9mi from the north entrance & Middlesboro (bigger than Pineville, has wlly world ect) about 11-12 from the south entrance.
Harlan is about 20mi & both entrances to Blk Mnt are about 30mi from the north entrance. Don't let the videos you've seen of Blk Mnt scare you off, they have plenty of easy trails you just don't see videos of them.
Personally from the little time we spent @ Wilderness I like Blk Mnt better. The big plus for them is it's still free at this point but Blk Mnt isn't much.