in South Dakot from southeast to west, my impressions. Plus a bonus Wyoming suggestion.
Stop in Beresford SD (exit 50 on I-29) for gasoline, they always have the lowest prices.
Buffalo Ridge, about 10 miles west of Sioux Falls is useless, don’t even think of stopping.
I think the Corn Palace in Mitchell is a complete waste of time, but then I’m not excited by a bunch of dry corn.
There is a rest stop just east of the Missouri River in Chamberlain SD. This rest stop has interesting, free exhibits of the Lewis and Clark expedition. It is quite well done and a good place to have a nice view of the Missouri River.
Al’s Oasis on the western bank of the Missouri River is a fun place for any meal. It is also a good place for gasoline, then you won’t have to refill until you get to the Wyoming state line where prices go way down.
Most of the stops between the Missouri River and Rapid City are just tourist traps and should be avoided if you want quality food or merchandise, with a couple of exceptions. On the other hand the scenery, if you enjoy the open range, nothing for miles, grasslands as far as you can imagine, is incredible. Watch the Kevin Costner movie “Dances with Wolves” for a preview of the scenery.
The Badlands are really great. It is worth the time and slow driving. Stop frequently at the pull-offs, get out and walk around, it is amazing what you can see (wildlife and geology) just 20-30 yards from the road.
Wall Drug is worth the stop, the food in the cafe is pretty good. By the way, Wall Drug is in Wall SD. My car automatically takes the exit for Wall, Mrs. Labor has to hold the steering wheel straight to keep the car on the interstate.
About ten miles west of Wall on I-90 is the town of Wasta. There is not much to Wasta, its population is about 70. There is a little old-fashioned hotel that is fun. It’s the only one in town. Actually the hotel is really boring, however, there are almost no lights in Wasta so the stargazing at night is spectacular. The hotel is reasonably priced, don’t expect reasonable prices in the Black Hills.
The Black Hills are great. If you want to stay in Rapid City or the Hills overnight you will need a reservation ahead of time. Expect to pay way too much for a room. Instead stay in Wasta!
Remember the western states are really big. A plan for tourist stops should consider that it takes about one day to go across each state.
Finally, it is a bit out of the way but…
When you pass Sheridan Wyoming consider taking a detour at exit 9 (Ranchester) Proceed over the Bighorn Mountains on Hwy 14 until Burgess Junction, then take Hwy 14A. This is nicknamed the “Oh My God Highway.” The section that goes down the western slope descends several thousand feet in five miles, it is really steep, and aptly named. Then proceed along Hwy 14 to Lovell WY, then veer north into Montana on Hwy 310. It is off the beaten path, still civilized and you will get to enjoy the mountains.
Be careful in Montana, they drive really fast.