We personally plan on getting married in a courthouse before I leave for Cancun. We plan on doing it secretly and only bringing my grandmother since she is too old to travel and it can be our little secret! It'll help her feel included. My reasoning for it is that I don't want to waste any time when I get there. I should be enjoying my trip and relaxing, not giving blood and filling out paperwork for an additional $300!! Cancun has a two day residency requirement that they are very strict about and I don't want to take any chances either. I know people that have taken this route and said that it didn't take away from the wedding excitement at all.