Redbird,
I've only been to Hickory once, last year. It wasn't nearly as crowded as the parks. The action was slower, but I really enjoyed it and am looking to go back soon. If you've got a couple of days, Capps and Crane aren't too far to combine a trip.
I think its worth the trip, but the recent flooding may have made it unfishable for a while. There was a clean-up effort after last year's flooding and it may need it again.
You may want to start from the park and work your way downstream. That's my plan, anyway, the next time I get the chance to run down there. I've been wanting to work my way down to the Spring River confluence.
Good luck and post a report if you go any time soon!
Bob