I don't know about making Flagg into a State PArk...it's always been a secluded, quiet place. I don't want a State Park to change that.
That's pretty much the entire Pinhoti you've descirbed as secluded/ quiet. And making the PT part of the AT would end that. But if "they" want to be serious as a hiking destination there needs to be some infrastructure in place to handle the Spring thru hike crowds and weekend warriors.