A good buddy of mine did that drive back in 2000 from BWI to ANC. He was telling me that when he hit the Canada boarder by MSP I think, the Canada boarder patrol asked him how much money he had on him. He told them $1000. They want you to have plenty of money to get your car fix so you don't get stuck in Canada. That is what they told him. He didn’t have the 1700 that they wanted so they told him where to go in the US to get to an ATM and get the rest. Then they let him pass. Have some type of XM radio. Because you will loose ALL radio stations at one point, even AM.
Good Luck and welcome to Brown.