The only track I've been to where we ran slicks, we used Trinity's extra firm blue foam (basically like rock, only lighter) and soft compound tires. I'm not sure if you'll be using reds or pinks, so check before you go.
For that track, we'd wire brush the sticky dirt off the tire and use a toothbrush to scrub in some Zip Grip about 5-10 minutes before heading out to the track.