the track is most definately a hard track and i would advise that u get someone who has done the track before and is a good driver to get all of the competitors out on the track for a morning walk...which is compulsory. plus maybe have the first 1 or 2 runs as untimed and practice... esp true for the noobs for the day.
you do not need semi slicks (thought will be better, maybe) as the whole track is less than 1k long and semi's take longer to heat up to proper temp. and with brakes a "fucking good" set of street/track pads is an absolute must, nothing too track oriented, the pads need to work from the word go.