Welcome Ron,
You're going to have a ball.
I'd suggest getting enough sleep in the days leading up to your 3-day, eat healthy and regular exercise will only help your cause. The days are long and you'll enjoy them and retain more if you're well rested and reasonably fit. As mentioned on other threads of this nature, having a change of clothes with you each day if it is warm or rain occurs is also a good idea. Reading Carl Lopez's book "Going Faster" will get your head in the right place going in.
It's a wonderful progression of exercises that may have you thinking about doing the 2-day advanced course before you've finished your 3-day. BTW... A high percentage of racers/instructors are pilots.