Eventually found a nice spot, but was very hard to find free camping
Had to use freecamping.org to find a spot. We were naive thinking that National Forests have free dispersed camping, but the White Mountains charge at least $20 at their sites and forbid you to camp in any place we found. almost everywhere you look are no camping signs which is so unlike many other national forests. Anyway we eventually found some spots on a forest road (I think752) that would have been very nice and secluded if it weren't already so late and they weren't already so full