Years ago we bought an rv in another state 12 hrs drive from us. We held it with a deposit on our credit card. We then drove and picked up the unit after our inspection and gave the dealer a bank check for the balance. The credit card deposit could have been disputed by us easily if the unit did not meet our expectations and the dealer was not wishing to refund the deposit.
Recently we bought a unit in another state 7 hrs drive away. No problem, just do not sign anything until you get there and inspect the unit. If the dealer will not accept those terms, find another dealer.