Is this up here you are talking about, or down your way? I'm off work tomorrow, and I've been itching to play on the quad. It only takes a minute to load it up and be on my way.
EDIT - Eric, if you are concerned about spark you can get stuff at the parts store that will seal up all of the connections. You would want to hit the ENTIRE ignition system, I'm sure that its all pretty low. Of course, the other thing to worry about is getting water in the intake, and short of an ugly ass snorkel, there's not much you can do about it.
EDIT DUECE - If you submerged your diff's, you need to drain out any water that got in and regrease. Also check wheel bearings, that shit don't like water. My previous offroaders have never been able to go highway speed, so I wasn't all that concerned about, but in a car that can do 100+ you want to be sure everything is how it should be after subjecting it to whats out there.