hey neighbor! Did you get power back?
From what I remember when I moved from CA to Seattle (and thought of buying a car there), I think they can hold sales tax for you, but you must register/pay WA state sales tax w/in a few days. Try calling CA DMV (not the most helpful folks), but their info may be different from the Dept of Rev. Just a few thoughts....
I've read about this whole "state line" thing. There actually is a fraud alert out there about people buying RV's in CA in delivering in non-tax states (like OR and Montana). How it worked is that an escrow company gets title to your trailer, and then "delivers" it to you at the state line. PO box or similar is set up in that state for registration.
Why I mention this..... just be wary of who is actually holding your title. Apparently there were some "rouge" escrow company's out there holding titles for "ransom."
I'm sure you can't wait!
congrats!
Marc