Do cut them down and make the whole area the same. Will they grow back in time? Probably not enough for a wedding, but you could stick in some annuals for color. And really, no one is going to be worried about plants when two lovely people are getting married.
I'd go for the annuals, and get someone to help you a few days before, also get some expert advice on how long they will take to open and how long they will STAY open.
Everyone had some storm damage and no one's going to fault you for cutting them down, if anyone even notices.
Relax. Enjoy the wedding. Take pictures. Share some with us.