If you've never been to Mount Rushmore, this would be the perfect time!
Lots of casinos and tourist stops! The weekend of the wedding will also coincide with Cool Deadwood Nights car show- this would be a fun activity for those with extra time!
Getting up to Syvlan Lake via Highway 87, also known as Needles Highway, is just as scenic, if not more, than the lake itself. Definitely a drive you won't forget!