Thinking about flying into Billings, Montana next June to attend the Custer reenactment battle. Would like to spend a couple of days there then make a circle and return to Billings at the end of the week. Would like to swing down through the Big Horn Mountains then head toward Yellowstone. It will be mostly a sightseeing trip with stops at various points of interest. What would be the recommended miles per day for a trip like this? We would like to get a motel wherever we ended up at the end of the day. Just starting our planning and appreciate any comments and suggestions. Thanks....