The cheque did bounce. I went to my bank Monday and it has been returned stating the client had insufficient funds in their account. Working right now but will try to find time to go to speak to my bank later
Be philosophical. You're not in a worse position than you would have been if you had followed my advice (and that of others here), and done the day without payment.
You could sue on the bounced cheque and win without any difficulty. Whether you'd ever see the money is another matter, since many small judgments go unpaid, and you'll then have added court fees to your loss.
However, you did the day; the atmosphere was not spoiled, since you thought that there were no money worries; and now you have them over a barrel. Until they give you a cheque which clears (and obviously you don't release anything until you have cleared funds in your account, which usually takes three or four days), they have no photographs of their wedding day. If they pay, great. If they don't, well, you chalk it up to experience and you've lost nothing but your time.
My sympathies. People are bloody awful to deal with sometimes.
I'll bet they paid for their holiday, though!