We have a few days between a hockey game in Minneapolis on April 9th until we need to pick up our son from university in Winnipeg, Manitoba. We are scheduled to pick him up on Saturday 13th but could delay until Sunday 14th. We thought it would be great to drive over to Rapid City, (long day on the 10th) to see Mount Rushmore, the Badlands, drive north through the south of Theodore Roosevelt National Memorial Park before heading back east to Fargo and up to Winnipeg.We don't mind continuing north through North Dakota into Saskatchewan, either. Any thoughts about highlights to see and where to stop/stay for 3/4 nights on the journey would be greatly appreciated. If we can avoid the interstates and take scenic highways we would prefer that.