For 2wd Buggies:
JC Rounders FR/Double Dees Rear -- Green Compound
Losi Tapers Fr/ Bk Bars Rear -- Pink Compound

For 4wd Buggies:
JC Double Dees all around -- Green Compound
Losi Tapers/Bk Bars Combo works best for 4wd when the track is nice and smooth.

For tomorrow, depending on how dry the track is, Double Dees might be a safe choice.

For Truck:
I like the Double Dees Rear/Proline Edge FR or Double Dees all around, Everyone's raving about the new Calibers or Calipers, haven't tried them myself though, I'll probably do it tomorrow.