There might not be a sustainable food source. The deer may well be finding some legumes, fennel and other browse up under the new pines.

The deer are likely using it as a travel route or as a place to lay up during the day. Could also be using it as a staging area before moving into a field or pines. You just gotta look at the big picture. Where are the deer going? What are they doing in the pines? Where are they coming from? What else is around that a deer needs?

As to the best way to bow hunt it: You are either going to have to get high or get low. That means a treestand on the fringe of it, or a ground blind in among the thick stuff. If you were rifle hunting, a tripod stand would be a good bet, but you will stand out right much (think of yourself as a flag marking the hole in the middle of the green), and you will likely get busted.

I would look to the ground blind idea. Pay attention to the wind, and try to find out exactly why the deer are there. If you can find where they are entering or exiting those pines, that might be a better spot.