My family (me and 3 kids 8-11 y.o.) plans on section hiking about 150-200 miles of the AT summer 2021, and I am looking at the NY to VT area (haven't nailed it down just yet). Do we have to have reservations for any campsites in that area, or can we camp at any site or shelter? We will have a 2p and a 3p tent. Will we have problems finding space for our tents because of generally small tent sites or overcrowding? Because I will be the only adult, I don't want to put us in a situation where we are constantly struggling to find shelter, or where we have to make it to a particular shelter/campsite where we have a reservation, since with kids I don't want to have to guarantee we can make certain milage and would like flexibility. Thanks for your help.