How many days would we need to get a decent overview of the main sights in the area of S.D. around Badlands N.P. ? I am specifically wondering if we would be able to visit the park and also do the Needles Hwy. and/or Deadwood with at least a look-see (even if we won't have time to stop and see them leisurely) of Mt. Rushmore or Crazyhorse. We should have most of at least 2 days in the area or maybe 3 at most. Thanks for any help! I need info ASAP! Thanks for any replies.