Ryan mentions some great campgrounds around the Valley and he is correct. There is always Dolly Copp on Rt 16 and Moose Brook State Park (although they have had some recent toilet issues in years, not sure if been resolved) off of Route 2, via Jimtown Rd in Gorham.
"LIVE FREE OR DIE...DEATH IS NOT THE WORST OF ALL EVILS." Gen. John Stark. "by reason of much foule weather and Extreme Bad Woods to travel in..." From the letter of my Great Uncle, Samuel Willard (accompanied by my grandfather Henry), to Governor Dummer on August 16, 1725, explaining the reason for his return, being instructed to "range all the country", of the Wawobadenik (White Mountains) July 19-August 16, 1725. I am a 13th generation New Englander and proud of it.