Minuteman is a great campground, but the last I knew Garmin still had the wrong address. It's close, but you have to go around the corner to the entrance. The Garmin address is the middle of the campground. Contact the CG for a real address or coordinates. From there you'll have a 5-hour drive to Mt Desert on a good day, depending on which route you take.
EZ pass is a must. Sign up for automatic replacement of funds and you won't have to worry about anything in that line. Especially great at those interchanges with full speed lanes. Works from Illinois to Maine to North Carolina.
fred.