Quoting a destination wedding

I'm being asked to quote my first destination wedding. To make sure all my bases are covered I'm assuming that in the quote, my airfare, 2 nights of hotel, and other misc travel expenses are covered. Anything else that should be included? Otherwise I'm planning on quoting my standard wedding rate.

Also what's the etiquette on bringing a guest and making my own vacation out of it afterwards? Of course whoever I bring would not be seen or heard from while I'm working, but I'd then make my own reservations at a different hotel and have a later return flight. I'd of course communicate this to the wedding planner and bride. Anything wrong in extending the stay for a few more days?
--
http://novophotography.com