GOOD LUCK!!!!
You will do great!
And the time from when you get there and setup... until the start... will FLY by. I personally use the time to get in the pool to warm up. I can't just sprint 300 yards early in the morning.
If you do have extra time... why not put on some music and focus on finishing the race with all your goals accomplished? Get inspired and visualize success.
I hope you have fun! Make sure you give us a detailed report when it's done!
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"