MerryLynn - My earlier route recommendations were based on possibility of your leaving Texas and moving to WA later in the fall; that's why I thought US 101 would be a better route in OR and part of WA because of snow in the Siskyous. If you leave before the snow flies, then take I-5 up thru OR and WA and when you get to Burlington, which is about 70 miles north of Seattle, turn west on WA 20 and go to Whidbey Island. Saves you the ferry cost from Port Townsend or Mulkiteo, unless you're heading to south Whidbey, which would be better to drive up from Mulkiteo, take the ferry, and save some mileage. There is a long wait for that ferry if you get in line after about 2pm because the Boeing workers are getting off work and many drive up to Whidbey where they live. Also try to drive north thru Seattle after 10am and before 2pm to avoid commuter traffic. Regarding chains for your tow vehicle and the trailer, purchase some from Les Schwab there in CA or OR, if you don't use them they will refund your money. Have a good trip, you will like Whidbey Island!