We are planning our summer vacation and would like to drive from DC to Maine (approx 11 hrs.) staying in at a motel over night and then camping in Acadia National Park for a few days. For the drive home we will go to Portland and make stops in Mass. and NY along the way. Our puppy will be 20 weeks (5 months) old by then. Has anyone made a similar trip to this? Can this be done with such a young puppy? Should we postpone the trip to later in the summer or next year when the puppy is a little older.