How to temporarily waterproof a high end digital SLR Camera for very cheap or free?

I Have a very expensive camera, and I want to take it on a jetski with me at lake powell. Im worried about it getting wet or damaged. What is the best way to waterproof it for very cheap or free? I was thinking plastic wrap or plastic bags, but I wouldnt be able to acess the controls that way. Anyone have any ideas?

Aquapacs are a lot less expensive than those dedicated marine cases, but they're not as easy to work with and you probably don't want to use it for scuba.

http://www.rei.com/product/752138

It's definitely a step up from a plastic bag.

When you say 'high end', do you mean something like the Canon 1Ds Mark II? If so, don't do it. Get a digital Rebel as a backup camera and fit it with the Aquapac....better yet, use a smaller digicam with a smaller Aquapac.

Don't try any cheap ways to do this, that's way too nice of a camera to chance it with. I would look into whether there are waterproof cases available for the specific camera you have. Don't use anything other than that. Many camera companies do sell these for their cameras, or third party companies might make one that works with that model.

I would leave it at home and buy disposable waterproof cameras...Murphy's law dictates that you will either lose you camera in the water or it will get wet.

A cheap waterproofing solution WILL fail when you need it most. Go get a couple of the disposable waterproof or underwater cameras. They're MAYBE $6-$8, and take decent pictures. Have the pictures put on a CD when you get them developed.

If you lose one, you'll just shrug your shoulders and move on. Lose your digital camera that way, though, and you'll kick yourself for a long time.

Are you nuts?
Sorry, I just had to ask.
You are saying that this is a very expensive camera...yet you want to do the cheapest way to protect it.
Find out if there is a waterproof case if you HAVE to take it with you. Other wise get a disposable ( just in case)

Probably not the best idea to take an expensive camera anywhere near water, especially if you love it. I say go get a disposable waterproof camera and when you get the pictures developed ask for a jpeg disc. Then you have copies and are able to email the photos. The resolution on the kodak underwater cameras are pretty good even underwater and then you don't have to risk losing your nice camera.

You can't, period. If you get water inside you DSLR, you've probably killed it. It's up to you, but I would look at a disposable waterproof camera.

Even if you waterproof the camera using a plastic bag, what prevents this bag from sinking to the bottom of the lake if this slippery wet camera slips out of your hands? The best solution is like what others suggested, use a disposable camera, or invest in a waterproof case and a foam floatation which you can attach to the strap.