As a business major and complete dork, I disagree. However I do know that the idea of writing a 15 paged plan isn't appealing to most people. Unless you are applying for a loan, you don't NEED a business plan, but you should make a mini one.
S'mores bar - roast your own s'mores. What an awesome wedding reception idea! Would be so much fun for kids- although wouldn't it be more fun (if you have a small wedding) to have a Campfire outside and roast s'mores