Yes, Kate Wolf actually composed "Give Yourself To Love" in a couple hours for some friends' wedding, and it's a very popular one. (I personally think it's not one of her best poetic works, but the fact that she threw it together in a hurry may have something to do with that.)

"Two-Way Waltz" is, I think, one of the best songs I've ever heard for a wedding--although some of the lyrics in the first two verses seem to be describing the personalities and relationship of a particular couple, so they may not really fit some other brides and grooms.