See, I missed all that cool stuff! Walk the track? Are you kidding me? We would be allowed to do that? Wow! Definitely camping next time. Thanks for the tips!
Sure you can walk the track. We showed up the day before and no one was there/Track was cold so we just walked the whole thing. I found a bent engine rod, part of a cylinder head and all sorts of bits and pieces. You can also look closely at the "tar snakes" and see how different they are from the ones you see on the public roads. You'll be surprised how far/big things are when you're on foot.
Enjoy.
Also, the water referenced above is potable (I think) so no worries there. You can back your car up to the SE corner of the building to assist in shade/wind shade. Check out the stars while you're there after all it is a desert. Befriend the people in the front office, they're fun too, as is the gate attendant. We lucked out and there were drag races on Saturday night (we were there for two track days) on the big track (Unfortunately we missed them due to some 'health' issues with one of our riders)
It'll be good times, I'm sure.