If I were you, I would look into hiring a captain to bring the boat around. Sailboats are not really meant to be on trucks over roads.
If you must truck, make sure that:
the price includes de-commissioning the boat (un-stepping the mast, etc.) and getting it packed up, ready to ship and loaded on the truck;
whoever is doing this is competent;
have a complete inventory of what is supposed to be on the boat when it leaves FL
know what it will cost you to re-commission the boat when it gets to WA
be there when it arrives with your list of what was supposed to be on the boat and check it before you let the trucking company "off the hook"
I've read multiple cases of mis-steps on each of these issues, of course, along with many more who have had good experiences.