We are staying in Deadwood for one night on our Black Hills/Yollowstone vacation. We planned on driving to Cody from Deadwood early in the morning. We had planned on staying here 1-2 nights depending on when we arrive. By MapQuest, It looks like it is a little over an hour to Devil's Tower, where we plan to stop and the let the kids (12 &7) get out and explore a bit. It then looks like we have over 5 hours before Cody. Anything else interesting to stop and see on the way? We like to get out at least every 3 hours or so to let the kids have a break from sitting. Otherwise, would it be better to find a place in the middle and hit Cody early. We prefer to get their the next day, but our schedule is still being worked out. We had just planned on doing I-90, but if there are any scenic routes that are better, we are open for suggestions.