You may end up with great beer and you may end up with crappy beer, or more likely somewhere in between. Here's my opinion though : if this is wedding is going to be the first time a lot of your friends have had your homebrew, don't bring it unless it's something you'd be proud of. Your friends will still be around with the completion of your next batch, or the one after that, so don't feel rushed to provide them with beer. If they ask where it is, just say "You know what, I ran into some issues with the batch, and it's not bad, but we'll all get together next time around when I've gotten the recipe more refined."