I'm from there! :D
I was just there last week and all the shops and stuff are closed still but they'll be open soon. They've done a TON of rennovation and the walk up to the monument is fabulous. Used to be very rustic, now it's majestic.
I'd say go. While you're there visit Crazy Horse, the Badlands, Devil's Tower (I think that's Wyoming, but worth it!) and stop by Deadwood. It's a gambling town but it's clean. Not like Vegas. :lol: