submerging a bike

I plopped my '01 KDX in the drink yesterday. I was riding along the edge of the stream and lost traction on some snow. I headed down the bank and ended up sinking the bike. I got it shut off before it went under so it was actually pretty easy to get running again. After a short, cold ride home I washed it off and parked it. I'm regreasing all the bearings today, and my question is: Do I repack the wheel bearings too? If I remember right, they looked like sealed bearings.
Any advice appreciated.
Joe

Cool! Thanks everyone for the good advice. I took the air filter off in order to get home. The filter was wet and I didn't want to suck any water/mud into the engine. I hate riding without a filter, but there's still no dust here, just mud. So I figured it can't be any worse than gets done to a snowmobile. The carb was dry and so was everything on the clean side of the air filter. Looks like the oil on the filter was doing it's job. I did take the carb apart anyway...which was fine because I was just going to change the stock jets. Found lots of great jetting advice in previous posts here too. As a matter of fact, I chosen chain/sprockets, tires, tall seat foam, moved my handlebars forward and knew to pay special attention to the swingarm bearings all as a reult of this site.
The only burning question I still have is: Can the KIPS really rattle that loudly and not be a problem? I've never heard another KDX, so I have nothing to compare it to, but MAN! that thing is noisy. It's hard to believe it's normal.
Joe