A gem I have enjoyed is Pipestone National Monument, much closer to you, sitting in splendid isolation from other NPS areas on the Minnesota prairie,right next to Lake Woebegone. Perhaps you are familiar with it. It possesses absolutely the niftiest nature trail I have ever seen - a real delight....
One of our favorite summer activities is 'prairie walking', so we have been to the Pipestone Monument and looked down into the little quarries. Our visit two years ago coincided with a reenactment with 1880's military, settlers, and natives in period dress, tents, crafts, and cooking.
I actually was able to acquire some pipe stone from an approved source and tried my hand at carving a pipe out out the red stone. Servicable? Yes. A work of art like the Native craftsman we saw? Not so much.