New to the forum, my first post. From the UK. We are considering doing a road trip from Chicago, via Yellowstone, to Seattle. We have had a fair number of road trip holidays in the USA but never been to the above places. The trip would be for about 20 days and possibly in June 2019. As we would be going more or less east to west across the top/middle of the states is June a good time to do this weather wise? If we do this is there a best route, places not to miss and equally places not worth stopping for? Thank you. Michael