We just went there for the first time this summer. Was eating at the O in Concord, and the waiter told us about it. We couldn't believe there was an O in Wolfeboro we didn't know about, but that's because we always come by boat and stay closer to town...
We walked, it is just under a mile, but uphill the whole way. It's a great walk with a sidewalk, but is literally uphill. The upside is, the walk back after dinner is downhill the whole way
We found out later that they will also come pick you up if you don't want to do the walk.
We had our 3 kids there (17, 15, 12), and they loved the food. When we were leaving, we saw a table in the lounge area that was full of little kids, all working on coloring in the kids menu, so seems pretty good for little ones too.
I don't remember what we ordered, but everyone enjoyed their meals, and service was great. We'll be back!