We are on the east coast and heading to Seattle next summer for a family wedding. We want to take advantage of being together with our 21 year old and 15 year old, with much needed down time. We would like to fly out to somewhere in southwest/ northwest and take a family RV trip approximately 10 days one way And ending in Seattle. Things we like : amazing views, activities, not all day driving. Would love to hear about possible routes. Maybe starting south, or possibly even Grand Canyon. We are all over the board. Appreciate any advice!!