The Etcetera Shop, located nearby on Route 25 between the Dunkin Donuts and Circle K-Irving Gas frequently has 2nd hand frame backpacks.
Backpacking 30-40 lbs of Hannaford groceries across the 400 yards of highly scenic, flat, paved, shoreline walking path to the boat is so easy that even my Basset Hound could do it, if I had a Basset Hound. Even if it takes two trips.....aaarrrroooooo
!