We are now at Gardiner, MT and was wondering if we should go on to Seattle, WA instead of going south already for the winter? And would like to have some input on I-90 going into Seattle from here. We are in a 38ft diesel motorhome and have been here in Yellowstone for over a week and it has been wonderful!! We do want to go to Arizona for the winter, but thought since we were so close to Seattle, we would go there now and do our trip into California and down into Arizona for the winter. Have not traveled these roads and do not know what to do. Does anyone have any good ideas and thoughts about our plans. Please let me know, we thought we would take I-90 to Seattle and then down 5 in California.