Ive got to enter some waypoints into my Lowrance 320 LMS for a trip in April at a lake in Arkansas. I have not done this before. Ive read the owners manual and think I can do it...just havent gotten into the boat in the garage and tried it yet. Any tips? Would I just be entering latitude and longitude numbers and thats it? Just grabbing as much info as I can. Thanks, Poop.