Step 0.
Instead of having a seperate wedding cake, have the entire church made out of cake.
( Moon Girl Technologies horrendous beanbag, Fri 12 Jan 2007, 21:02, archived)

oh god this

( Boondocks, YEAH! has a massive penis. Everyone is scared., Fri 12 Jan 2007, 21:03, archived)

And hope it doesn't rain.
Soggy cake may be difficult to get out of the dress.
( Fork Has lost his bash virginity!, Fri 12 Jan 2007, 21:03, archived)

As long as you use a hard enough icing
it should be ok.
( Moon Girl Technologies horrendous beanbag, Fri 12 Jan 2007, 21:04, archived)