Tripod or other technique for long exposures?

I've been thinking about trying some longish exposures (> 1 sec.) and was hoping that someone has had experience with tripods or other stabilization techniques uw. I don't want to destroy my land tripod and don't want to use a "sand" bag due to how much surface area it covers on the substrate. Any suggestions for brands of tripod and long exposure techniques uw?

Gates has a UW tripod for their video cameras.

Have a look at the gates website to see if it is there, should work no problem

http://wetpixel.com/forums/index.php?showtopic=11284

whole other thread on this ..

or there was this one .. http://wetpixel.com/forums/index.php?showtopic=12493 bu that has less products on it

Thanks very much gentlemen, though I use that term very loosely for you Mike. That's the exact info I was looking for!

-Ethan

Ethan, you going to leave your camera on a tripod while you go off snorkeling?