Instead of Bar Harbor Maine where the water is absolutely frigid, in southern ME check into the Old Orchard Beach area. I would go in early AUG as the water sometimes peaks out at 70 degrees. The area is VERY popular with campers/rvers.
Old Orchard Beach Campgrounds &
Scarborough Beach Campgroundslots to do to keep the family occupied , Beach, amusement parks, water parks, board walks, great seafood.
Bayley's camping resort has the most bell & whistles, has a trolley to take you to the beach. Paradise Park camping resort is some what quieter and closer to the beach. Hid'n Pines family campground is good too. All the campgrounds are well run and get good reviews. We have been to all and enjoyed our self's for what they offer.
Also take a day trip to near by Perkins cove
Mike
2022 F-150 3.5 EcoBoost 4X4 Supercrew GCWR 19,500 157WB
Payload 2476 Maxtow 13,800 3.73 Equalizer 4 Pt Sway Hitch
2017 Jayco Jay Flight 24RBS
Old TV, 07 Toyota Tacoma, Double Cab, Factory Tow Pkg, retired towing at 229K. (Son now owns truck)