Many wedding venues will have you as the bride and groom sign their standard contract. This is an industry standard but it is when it comes to trying to take claim over your photo rights when things get a little weird.
Another industry standard is that your photos remain property of your photographer unless you have specifically gotten the copyrights of the photos. Not owning the copy rights to the photos, it is not something you can legally sign away to anyone else.
If something like this ever comes up with your wedding venue, be sure to have them directly contact your wedding photographer for further discussion.
I am by no means an expect on copyright laws but I do know you need to read your contracts thoroughly before signing anything!