Summer is fast approaching and road trip is our goal for this year. We are from Dallas (family of 4;2adults 2 kids using our SUV) and planning to go back after 15 years to Seattle for summer vacation . We have 3 weeks and we are going to stay in Seattle for a week . Our )first week going to Seattle , we want to see Mt.Rushmore and Yellowstone (how many hours are we going o spend there?) . What else can we see along the way? (attraction, scenic view,)Where can we sleep overnight for rest ( city)? Going back to Dallas , is there any other route that we can use ? We've seen Grand Canyon so that's out of our itinerary.