We drove almost 4,200 miles all told. I have the receipts for gas, but I'm too frightened to look at them. I'm guessing somewhere around $400 for gas, to and from. Gawdawful.
We didn't spend a great deal of time in Bar Harbor as the house we rented was on the "quiet" side of Mt. Desert Island in Somesville.
The house we rented was built in the early 1800s and definitely had some age-related "issues." The well water was undrinkable and there was only a clawfoot tub and not a shower on the ground floor. (I went upstairs to take a shower -- can't stand baths.)
Saw a play called "Shirley Valentine" that was a hoot. Single-person cast, who did a fabulous job. I ain't much of a summer stock theater guy, but that performance was excellent.
The whole experience was nice, but the next time Mrs E wants to go someplace on the outer reaches of the planet like this, she can fly herself. I'm staying home with the dogs and the parrots. 
You sound like M and BFF's husband! We went up there a couple of years ago, for her niece's HS graduation, in a little bitty town about 2.5 hours into the center of Maine. We also did a bit of exploring. We flew into Bangor, went to Camden and stayed at the Whitehall Inn - a really cool place where the original Peyton Place movie was filmed and supposedly haunted.
http://www.whitehall-inn.com/After the graduation, we went to Bar Harbor and stayed there for a few days.
I think Maine is beautiful. I spent a summer there in college, at a very exclusive girls summer camp, as a waterfront instructor/counselor. The parents paid more for 8weeks of summer camp, per kid, than I did for a full year of college tuition, living in a dorm w 3 meals a day, books, and spending money!!!
We would really like to go back up there and go to her sister's. It's pretty close to the Canadian border, from what K has said. She bought this really old - like 100 yrs + - dilapitdated house, that she has been fixing up for the last couple of years. Her husband hates it up there, and will only go up once during the summer for a week or so, and it would be fun to have a "girl's week" of exploring.
So far, the cheapest we've been able to find a way there, has been well over $500 each, and with K driving down to Portand or to NH.... right now, it just doesn't fit into the budget, for either one of us.
