NH Lakes Region
Lobster rolls: we stopped going to the Tamarack near Weirs Beach several years ago. Wonder if it has improved. It used to be a favorite weekend drive destination. We try to get to Red Hill Dairy at least once every summer. The Dipsy Doodle in Northfield has a small parking lot but we liked their lobster rolls even if not fresh picked.
You know lobster's not a lake fish... right? ;)
(teasing, I'm teasing)
One of the things I enjoyed there is Kellerhaus. You buy your ice cream then there's a big bar of toppings you can build your own sundae from. It is way too easy to go overboard with the toppings but it's fun. They also have a candy shop.
I ate at a BBQ place right on the road for Weirs Beach (where the train goes by) and Crazy Gringos. It's been a few years but they were both adequate to the needs but I wouldn't call them "must try".
We're usually there visiting FunSpot for the day, so great food isn't usually the focus. :)