When I used to live in NJ, Bar Harbor was a favorite destination for a week of refreshing from the workdays the rest of the year...having only a week, we didn't usually dawdle along the way -- one side trip to Cape Cod but we didn't stay there. For Bar Harbor, we liked to stay at Mt Desert Narrows which is just after you cross over onto the "island" so to speak. It was convenient to pretty much everything, buses stop at all the campgrounds and take you to/from town -- some of our friends thought that campground a little pricey, but in that area much is. We thought it was pretty peaceful at that time of year as the kids were all back in school. We would park down at the bottom; they call it right on the ocean, but it's more right on the cove that opens out onto the ocean. You get high tide and lots of peaceful water and seagulls; then low tide and out come the clammers. We would go about the same time as you are planning and some years it would be cold and windy, some years summery and beautiful. Haven't been back in probably the last 4 years due to moving to the Midwest, but it is on the bucket list to get back there asap. I still want to make the drive along the coast up rte 1, see some beautiful lighthouses, venture back into the woods a bit and see some moose....I'll live vicariously thru your report of this trip. Have a great time!