Mess with the levels / curves, then touch up contrast. Sorry about removing some bits, I was having fun with the new Photoshop beta...
lol, the 'tog on the left suddenly disappearing was humorous.
I don't think it was a good idea to remove the boat on the upper right though. It looks unnatural to me now, because you still have its trail in the water that abruptly ends, and if you enlarge it, you clearly see a smudge where the trails end.
Otherwise, the main problem with this image (IMO) is that it's still far too underexposed.
There's no detail in the sky (looks like a cloudy day) so you might as well just blow it out to bring everyone else up. It's supposed to be a wedding - grey skies make it look more melancholy than it should be.
Here's my quick and dirty edit. Ran it through very briefly; there are still more things that can be done to clean up the image, but I don't have much time this morning.

I'm also still using CS4, so no content-aware fill for me.
Removed the boat using the healing brush though, as it was easy enough. Turned the wake into a more smoothly fading wave.