I probably will have to shoot for a week on a fishing boat and I am worry about water drops on both my GH1 and GH2.
Can someone help me with a simple/cost effective solution?
The cheapest solution is to use a plastic bag or sheet of plastic, taped round the front of the lens, and big enough to cover the camera and your hands - tape to your wrists too if you wish. Its not elegant, but it is practical. In the past, I've known people make a kind of sou'wester cape of plastic with a slot at front for the lens.