Welcome aboard. I think a map of any new water is good to have and even to go back and look at after you have been on the lake several times. It is a great way to get an early jump and pointed in the right direction. Plus a great way to pass the time waiting to get on the water. If you get one of the water proof maps they sell in the stores you should be able to use a sharpie marker on them I think. Good luck and congrats on the the new boat when you get it.