A lot of good advice on here. We were also trying to avoid doing a brake change, and since we had a heavy car (Camaro) and a couple of inexperienced drivers who were likely to have a little trouble getting on and off the brakes quickly, I was concerned about cooking street pads. Unfortunately, our car didn't make it far enough to accurately gauge pad wear (only 22 laps), but FWIW, I put Hawk Blue pads on the front, and HP+ on the rear. The Blues don't need as much heat in them to work effectively as some other race pads, but still have much better fade resistance than street pads, so I figured they were a good compromise that would work reasonably well for both our experienced and inexperienced guys, shouldn't be too hard on the rotors, and should have made it the full 24 hours.
I put on new rotors and calipers all the way around, ran ATE super blue fluid, figured I had all the bases covered. But what did I NOT do, that came back to bite me in the ass? I didn't replace the rubber hoses. The left front hose swelled pretty much shut, leading to some "interesting" brake performance. Both front hoses on our parts car had the same issue, so we had to go track down some new hoses. Lesson learned.
Enjoy every sandwich.