No need to replace rotors, it won't gain you anything at all. Pads is probably a must on a 1LS since you don't have brembos and obviously fluid is a 100% must change for track. I personally use Motul RBF600.
What did the hawk guy recommend? Also, it's tough to find a pad that is any good for street and track. Good track pads don't stop well when cold and usually make some horrendous sounds on the street and destroy rotors.
Fluid will work for both track and street, there's not really any difference for fluid.
At a minimum I would probably use these:
http://www.hawkperformance.com/perfo...ce-street-race
I'm not sure how fast the track group at the fest will be but I suspect it might not be super fast, so it's possible the Street 5.0 Pads might be ok.
My best advice though if you plan on doing real HPDEs would be to have a separate set of track pads for the track. There is no perfect pads that can handle both street and track. I really overheated a set of Hawk HP+ pads at VIR North a couple weekends ago, and they are terrible on the street, so I run some stop techs for street and autox and going to buy something better for the track.