Moving out of state - what advice for moving Aquariaum?

Could you leave the tank up, have someone else ship it? Unlikely to be an option, but that would be ideal, since you could get a tank running in your new location and then have the occupants shipped up.

Barring that: mix all new water. Fill coolers about 1/3 up, put live rock in coolers. Easier to carry, some insulation, leak proof. Bag the fish, inverts, and any corals individually. Get some ammo-lock to take with you. Use it regularly as you travel, plan on opening the bags once and swapping out half the water for new SW from a jug. Make sure setting up the tank can happen as soon as you get to Seattle. Don't worry about keeping any of the water--you'll just import wastes. I'd probably even plan on starting a new sand bed, with a few pounds of seed stock from the existing tank.

David, I have tried this my friend and based on my trials, I can tell you I will never do it again. The stress associated with moving your other personal belongings is bad enough. dealing with delicate live animals on top of that is really tough.
I think the rocks are worth saving; using the coolers is a good plan, but give the fish away; you will likely save their lives in the process. This will allow you time to set the tank up properly and let things stabilize for a while before you add new fish.

You know, maybe it was just dumb beginners luck, but my stepson brought his 55 gal tank up from Lubbock, Tx, to Hutchinson, KS, without losing so much as a hermit crab. He picked up a couple cheap styrofoam coolers, got a a bunch of fish bags from walmart, took all the live rock & put it in 5gal buckets with wet paper over it (he didn't have much, maybe 30lbs), packed up the fish in separate bags, put all the hermits in a bag by themselves, put the bags in the coolers. Drained the tank down to where it was just wet sand, loaded it in the back of his Cherokee, & drove up here-I think he even stopped partway for the night! When he got here, we set up the tank immediately, filled it with fresh salt mix (didn't even wait for the ph to settle! You can tell how much I knew at the time!), added the rock, floated all the fish for about an hour, did some water transfers between the bags & the tank, then added the livestock back in.
He did keep his HOB filters and sand wet the whole time, so the tank never
recycled.
With this being a standard tank, & yours being a bowfront, I don't know if the tank bottom would stand carrying it and shipping it that way (the weight of the sand on the bottom might be a bit rough on it).
My 2cts.
HTH!