Thanks for the input all. Kim convinced me that Maine is not the Summer "Beach" location we were looking for. We are more Myrtle Beach types... But have done that 4 times in the last few years. Wild Acres is still on our to do list but probably for a fall visit.
We ended up going in a different direction and booked Anchor Downs in Tennessee. No boogie boarding but plenty of other activities to keep us busy. The kids have never visited that part of North America so it should be a good adventure for them