If your at all geeky you might want to invest in a couple of P7 flashlights to do double duty as headlamps and for around the camp, Deal Extreme has a great selection that might even get here in time for your ride if you order soon.
Or if the price tag for P7's is seems unreasonable, WalMart carries a Coleman Max AA flashlight that would serve as well puts out a healthy 115 lumens and is nice and bright without being over large or pricey.
Its pretty easy to find mounts for flashlights that you can just velcro on or attach to your handlebars that would meet the parks requirement.
And I don't think you can go wrong with the PB Superflash rear lights they are a real value.
I envy you such a ride hope its very enjoyable for you.