I will be traveling with my daughter and her children over Memorial Day weekend. She lives in Denver, and we've taken advantage of the beautiful scenery and great hiking in RMNP, and her 8 yr. old is eager to see Yellowstone. What would be the most direct route, and which entrance should we take to get in the Yellowstone? We were thinking of staying in Grant Village for 3 nights, but am now wondering if we should make one night hops on the route before we return to Denver. What would be the best overnight so we don't have to make the long drive on one day?