Mail. Bills. Voting. If you're a nomad wanting to remain all legal-like, you'll need to take all these things into account.30day stay requirement: Must show a 30day consecutive stay in the state for residency. Moving your domicile from NYC to PA could allow you to avoid NYC income tax, but you'll need to demonstrate that PA is your new primary residence. You will need to bring your existing license and all of the ID requirements for proof of residency in your new state. Are you planning to use an address in Pennsylvania? Off the top of my head you'll have to have your RV pass state inspection.