The one main reason to hold a wedding is to include the people you care about in sharing your big day with them. Exotic getaways are romantic, and can be an experience of a lifetime - combining a wedding and honeymoon all in one. Destination weddings are not usually large affairs. They are small and intimate - unless you choose a destination that is within a short drive from your home and is not an inconvenience to your guests.
The main thing a destination wedding requires is ambiance. That could be seashore or lake setting, with a decorated arch or trellis set in the sand and chairs for the guests. Or an outdoor mountain cabin with a background of mountains. It could also be a tropical cruise, with all sorts of entertainment, food and lodging provided by the shipping line. It's best to consult a trusted travel agent (make sure to get references) to help you put something together that will fit into your budget, and consult your main guests as to what arrangements they can make, or share expenses with you on.
A nice idea to present your guests with are luggage tags as special favors, they are practical and considerate. If you are planning an evening wedding, flower lanterns offer a romantic setting that is amazing! There are so many beach themed favors and decorations to choose from to make a destination wedding absolutely perfect.
watching their parents make fools of themselves. You could plan one house to have a twister game while another could have musical chairs (but instead of hunting up enough chairs put towels on the floor and have them move from one towel to the other). 

For children, Diego the Adventurer is very popular now, so you can use that theme. Children can dress in tan coveralls, wear a