Got the main stuff! The heavier snow held off. Someone up there loves me! ;-)
Still have bunches o' boxes, plus some odds and ends - Van-sama's summer tires, which I should probably put on before we go, for instance - but the hardest part will be finishing cleaning.
I'm not sure you should change to the summer tires before you go; especially since you'll be traveling up in the northern tier of the country. You never know when a spring storm will hit and you'd need the traction. Could you lash the summer tires to the roof rack and just cover them with a tarp for the trip?