A little over a month and it's happy time! I believe I have everything in order, excursions pick, waivers signed, shows & restaurants booked, etc. My question is about the zip line that is a must do for myself and family. I had heard that once on board (first day/first hour) to registered/sign up right away down at the "On Air" club. Is this necessary to rush down there and sign up? Suggestions? Is the wait really that bad? Thanks in advance!!!