It's been resting on jack stands and had the rear brake hubs disassembled so they wouldn't stick. So first, close the hubs, then fill up the tyres and set it down.
Unfortunately one wouldn't fill, a busted valve appears to be the culprit:
Today I'll try to get the spare out of the trunk and see if I can make that one work, and if the other three held up through the night. Then out of the closed garage and into an bigger space so I can work on some bits.