I would take 1000.00 cash and not keep it all in same place for emergencies where only cash is the answer.
Use your credit card the rest of time as exhcange is not an issue.
When you get gas at pay at the pumps.......use your credit card,
When you swipe , it will ask for zip code. ENTER the 3 numbers from your poastal code and add 2 zeroes at the end to get a 5 digit code. It will work but be prepared to have to do two swipes if you put in more than 100.00 or some are even 75.00.
This zip code trick worked from NY state south to Florida and back without fail.........way better than two trips to pay for fuel at every stop...