i take it your going in your cos??
Have you got standard rear brakes??? If so either take a set with you or if your upgraded keep an eye on them. Both my 3dr and my mate in his saph killed our rear standard brakes in 2 laps of the ring.
I bought a 4 run pass when i was there,, and in honesty that was more than enough for me and the car,, As i had to drive it back to the uk too.
I did 1 run a day but 2 runs in one day and thats when my cos suffered,
However you gotta do it mate,, you might not get another chance go for it and have so much fun