When you get there you register and they give you a number and a wrist strap, to let you on the strip. ?10 if I remember.
Then its just a matter of lineing up in pairs, until you get called up to the lights, have to pull forward a bit so you are in the timeing area. Lights run down to green, and go, or with my efforts spin, spin, spin.
Blast down the track, take a left and join on the rear of the twin lane of cars to have another go. Go back to the register office for the print out, all very easy.
I had snow on the day so they closed the strip, about an hour later they opened it up, most of the others had gone home, so we had a more or less continuous goes without the long delays.
It does get you, as you think, the next one will be better, more/less power, change up there. I only stopped when the clutch started to smell a bit.