While Hawksnest is mostly forest and ponds, there are many signs of former human activity Here's an initial attempt to list some of the area's historical assets.
The Bells were an old couple from Boston. In the 1950s, Hawksnest was very secluded. The Bells had a vegetable garden near their cabin, and Mr. Bell, a tall, slightly stooped old man with white hair and a bushy white mustache, used to do his gardening in his underwear--or less. So you had to loudly announce your presence if you went calling on the Bells.
After the Thompson and Bell lands were sold to the State, their two beautiful cabins were allowed to fall down, whereupon the State removed the remains. When the Bell cabin remains were carried away, staff found a curious home-made insulation within the walls--sea weed stuffed into "pillows" of brown paper. It was probably made locally, and I presume used the seaweed with the little air bubbles.
A famous folk-artist
A.E.Crowell is the most famous carver of decoys and decorative bird statues in America. Two of his carvings sold for over a million dollars. Mr. Crowell's workshop was on Orleans Rd. in East Harwich, and in 2008 was slated for a move to Sandwich, where it was going to be restored for $4 million. Apparently there was little interest in the old workshop in Harwich.
Crowell began making decoys for duck hunters, then managed a hunting camp--but as his talent began to shine, he made a living of carving and carved more works of pure art. His bird carvings are so life-like you could mistake them for a live bird, and are found in many top museums. More on Crowell.
The Walker Farm is located on the north side of Walker Road, looking down across an old field onto Walker Pond. When I was a boy in the 1950s, the building was still standing though in shambles, and the field was still open.
At the NE corner of SR 39-137, there was a small farm operated by Mr. Nickerson in the 1950s. He grew vegetables and corn. The fields came nearly to the south side of Round Cove Rd.
When the park began, except for Round Cove Road (and it's former extension to the isthmus cabin), Seth Whitfield Road, and Walker Road, there were no roads or trails in the park. I believe that the several trails that now ring the ponds or go down to the ponds, were cut by equestrians after the park was established. (Excepting, of course, for the two short trails that led from the two parking lots to the beach.)
The Head of the Bay Cemetery is just across Walker Rd. from the NW end of the park--indicating there were probably farms in the area. See the list of names on gravestones here.