Tenting is allowed only if you are 200' off the trail in the Pemigewasset Wilderness
I can't remember where I got this definition of the Pemi boundary, and can't claim it's definitive.
* 66 feet from Osseo, Franconia Ridge, Garfield Ridge Trails
* 100 feet outside Galehead Hut permit area
* 66 feet from Twinway to Bondcliff Trail
* 33 feet from Bondcliff Trail to point 100 feet S of Guyot Shelter spur, then 100 feet from spur and shelter returning 33 feet from other side of Bondcliff Trail
* 66 feet from Twinway and Whitewall Brook
* 66 feet from Ethan Pond Trail to ridge S from Mt Willey
* follows ridgeline all the way to East Side Road with 100' deviation at summit of Mt Carrigain - no such deviation at Mt Hancock so apparently part of Hancock Loop Trail is in Wilderness although not signed as such
* 66 feet from East Side Road to 66 feet beyond gate
* across to Wilderness Trail and back to 33 feet from Franconia Brook
* up Franconia Brook to E of northern tip of Black Pond, then over to pond
* follow pond shore (which not specified but presumably W to connect below)
* 33 feet SW from Black Pond Trail
* 66 feet from Wilderness Trail back to Osseo Trail
If these are correct, how does that impact the OP's question?
There are places where you can sleep anywhere on one side of the trail but not for miles on the other, and I don't always remember which side is which.
I have always maintained that no one should sleep in the White Mountains without a surveyor and a lawyer in the party, both of whom you have paid to have done the required research.