June 7th & 8th – Our original plan was to drive through Yellowstone NP on our way to Sheridan, WY but snow had been predicted for the higher elevations and we decided not to take any chances so we drove back to I-90. We still went through some snow flurries on our way to I-90. This revision to our plan resulted in our being able to stop at Little Bighorn Battlefield National Monument. When we arrived at the campground in Sheridan, WY, we found out that the road we had originally planned to take had been closed due to the snow and flooding. Good thing we are flexible! From Sheridan, WY we continued on I-90 until we decided to get off the highway and visit Devils Tower National Monument. What a site! We had lunch in the towers shadow and then continued on the back road into South Dakota.