Awesome itinerary you have lined up. You already have the ones I would recommend on your list, but I'll offer these thoughts as well:
Van Sant is a must see anytime, but most fun on the weekends when all the cool planes there are out flying.
Campbell Field (9VG) is a beautiful little field and well worth visiting, but it tends to see little activity except when Soup-On-Sunday is being held. See
www.campbellfieldairport.com to confirm it is on for the week. Unfortunately there is no fuel available, but you can get some just up the road at Ackamack.
Andover-Aeroflex is one of the gems of the northeast and a personal favorite of mine since NJ is my homestate and Andover is tucked away in the little-known NJ countryside. I also did my tailwheel signoff with Damian there and thoroughly enjoyed the experience.
I'll add .02 on the book recommendations:
Zero Three Bravo by Mariana Gosnell (around the country in a Luscombe) &
Flight of Passage by Rinker Buck (two brothers cross the country in a Cub)
Both great reads about exploring the grass roots GA infrastructure our country is lucky enough to have - and that is sadly disappearing. It would be interesting if whatever level of write-up you do included a commentary on the status of that infrastructure and what effect people think the proposed user fees will have on it.
On a side note, I just got back from a flight from NC to MN to deliver a 182 and bring back a Stinson. It was disheartening that in that whole flight I only saw one other GA aircraft in flight. No doubt there were others, but overall there appeared to be very little activity.
Enjoy your travels!