Things we learned while driving through Canada to Alaska

We have ATT unlimited plus, which includes free calls to and from Canada and Mexico as well as unlimited data. It worked surprisingly well in both Canada and Alaska. And, later in the fall, it worked very well in Mexico. We carried some cash, but it was rare that we couldn't use a credit card. The easiest place to get cash is at a Wal-Mart, since you don't have to pay an ATM fee for the cash.