From everything I've seen, there are no hard and fast rules for destination weddings, and you can wear just about whatever you want!! Obviously for temperature concerns, you wouldn't want a great big multi layer full on satin ball gown (then again maybe someone would!! lol) but you get my drift. You want to be comfortable first of all, and yes look exactly like you dreamed so whatever works for you..... who cares what others think. If you take the time to look through photos on this site you'll see that the dresses run the full gamut of what's out there. So wear what you love and love what you wear!! The choice is completely yours!!!