Last question before my first Tri (I promise)

So I have everything packed and ready to go for my first Tri tomorrow.  I have to be up by 3:30AM to get to my training partners home by 4AM.  So the registration opens at 5AM to 7AM I guess along with the transition area to set things up.  There is a meeting at 7AM and the first wave starts at 7:30AM.  So I plan to get there when the door opens so I can set things up.  My question is when I'm done setting up and it's 5:30AM Do people start getting in there wetsuits right there and leave all there stuff in the transition area or do you take all your swimming stuff out of the transition area and just hang out till the time gets closer.  If you do that what do you do with all your clothes that you just took off to get into your wetsuit.  The temp is going to be a warm 53 degrees so I'll be in a hoodie and some warmup pants, or do I wear the wetsuit for an hour and a half before the waves start.  I don't want to be the rookie that drives to the race in his wetsuit.  I think this will be the last question until my first Tri or at least until I start panicking at 2AM.