We've been to coastal Maine in summer, but sans boat (it was in the early 90's & I still dream wistfully about lobster pounds)...but when our big catamaran is done, it's going to be one of our primo destinations. A number of the full-time and part-time cruisers we've met spend the winter in Florida or the Bahamas and summer in Maine with stops in the Chesapeake on the way down and back up the ICW. It's a lovely lifestyle.
If we were to do more foreign travel, I certainly would go to a country that appreciates the United States, not one that is hostile towards us or our interests.