Gosh, I wish I could remember where it was or the name of the resturaunt,it has been some years back, maybe someone here can help me. It was on the Vermont side, we stopped for dinner one night, I remember the east side was lined with big windows over looking the river. The atmosphere was great as was the meal. I have thought about it often since, but the cobwebs persist!
I'll have to get out the map and study it, see if I can remember anything. The colors here are starting to pop as well, oh how I wish I could be there, eat plenty of maple creemies, cider donuts, and cider for me!
You'll have to haul a portapotty around with you ! 
Cold Hollow Cidermill on Rt. 100 in Waterbury Center makes them. I'm not sure who makes them in NH. They may have them at the Bath Country Store or maybe at the country store on route 117 in Sugar Hill. Both are " must do's" if you are staying in Littleton. If you look up the definition of vacation, you won't find the word diet anywhere.