If you are going to be out in the woods for a straight two weeks, chances are you will encounter cold nights. I would suggest you get a 2.5-layer jacket. These jackets are better insulated, but they are not burdensome. If you are concerned about packing, it will also be easy to pack or wear because it is not too thick. I would also suggest that when you buy a raincoat, get one that is one size bigger so you can layer it. These raincoats are meant to keep you dry, but in cold weather, it is not enough to keep you warm.