We went to the fair when visiting friends in Maine a few years ago. Did not camp, as our friends are RVers and have hook-ups at their home we used.
If you go, have some of the delicious fresh cut French fries. And the apple Betty. And the sausage sandwiches or bar-be-que. And enjoy sampling everything they can possibly make from maple sap as well as all sorts of other goodies.
I know it sounds like all we did was eat, but you get something to eat then walk around looking at the demonstrations of antique wood-splitters, ice cream makers, and other machinery. Or stroll through the other exhibits.
We had a great time but the traffic was horrendous. So glad our friends were driving and knew a few back roads we could take to avoid most of it until we got really close.
Fran & Tom/ 4 rescue cats - Benci (2014), Peaches (2003), Tipper (2002), Snippet (2002), & in spirit - Aja (1996-2014)/2011 Winnebago Vista 30W/2008 4 door Wrangler 4X4