As I recall and it is slightly possible that I am incorrect, the entire 130 acre Timber Island was owned by one family from Rochester, NH, for many years. Up till about 2005, it had one and only one seasonal shoreline cottage on the entire island, and the island looked to be 99%, thickly forested.
Wanting to preserve Timber Island in its' natural condition, and not getting any interest from the State of New Hampshire, the seller designed a conservation plan so most of the island would remain as it had been.
In about 2005, a 120 acre conservation common area was created, and three seperate lots, one including the original owner's cottage, of about three acres each were created and sold for aproximately $433,333. each, for a total of three, separate cottage lots occupying a total of about ten acres on the 130 acre island. The sales agreement for each of the three separate lots contained limited use rights to the remaining 120 acre common conservation land.
I recall reading somewhere that forestry students from UNH have been there, from time to time, for academic studies.
Hope this is an accurate description.