Pick one in State you are going to use as 'domicile' as that will be your 'legal address' for establishing 'residency', Drivers Licenses etc.
We established our 'address' several months before hitting the road....gave us time to get all the 'change of addresses' sent out until no more mail came to our S&B....all was going to mail forwarding service.
Then we meandered our way over to that state and 'established our residency' by staying overnight and getting DLs, Vehicle Regs, Voting Register