Although it does end up costing a lot more than it originally seems when you think about a destination wedding, I wouldn't worry too much just yet. We had about 55 people saying they were going to come in the beginning, and now our final wedding count is 35. When it comes to actually booking, a lot of people dropped out, it just depends.
For the photographer, we really wanted ours to be with us for the whole day since I wanted photo's of me getting ready in the morning with my bridesmaids, through the ceremony, and right into our reception. We were lucky and found a photographer who was willing to stay the whole lot of it.