Pretty much any land that a town owns that they do not intend to develop will be labeled "Conservation" land. It's a tax thing.

Most towns do not allow firearms on conservation land by by-law and hunting is "prohibited" but that does not mean that you cannot hunt it.

Town conservation land is controlled by the conservation agent(s) and the conservation commission. Some will allow you to bow hunt the land with their permission, but sometimes unfortunately it's all about who you know. But you can try:

First, identify the parcels that you'd like to hunt. Walk them each and get to know them, including where they may abut private land and especially houses.

Then, make an appointment to meet with the conservation agent, explain that you're a responsible bow hunter and you're interested in helping to manage the deer herd in the town. If you get a flat "no way", then I'd suggest dropping the issue unless you have the time and energy to take it up with town officials (usually the selectmen or town councilmen).

If you get your "foot in the door" however, go on to show your knowlege of the area, point out where you would plan to hunt on a map (which will usually be on the wall in their office with the conservation areas labeled). Show that you are both conscientious and respectfull. It may be decided that the commission will have to be consulted, which isn't in your favor but it's a shot. Either way, make sure to leave a card with your contact information. Having a copy of your hunter's safety card with your contact info is a nice touch.

At every step, it's important to appear as respectfull, responsible and intelligent as possible. If you do get permission, be sure to ask for written proof so that it can be presented to anyone who might question you (nearby landowners, law enforcement, etc.) It can also be useful when this agent moves on and the commission members change. For that reason as well, you will want to remain in contact with them from time to time. Let them know of any problems you might see on the land (illegal dumping, other hunters, etc.)

It's a real long shot, but it can be done and if it works you'll have a prime hunting spot truly all to yourself!