Hi Raywilliams,
If you're planning on taking cuttings ... Take labels and something to bind the same cuttings together. Take empty water bottles for the cuttings not to dry and paper towels that you'll wet later to keep the cuttings moist during transportation... I wonder how I know :P
Taking a camera for pics of the mother trees is as well a good measure to keep track of what the siblings might become ...
Good hunt !