Go next year, only go on Wednesday or Thursday while the madness is containable and you can actually get to the vendors and check things out as my wife and I did.
If you want to go back on the weekend to see the crazyness go to Meredith, park at the train station and take the train into Weirs. Easy in, easy out.
My wife and I got stuck on a hill in Wolfboro on Friday afternoon and I thought our engines were gonna cook.
