If I am going to attend a "Destination Wedding," what type of gift do I give?

If I am forced to pay (like everyone else) for airfare and a hotel stay, do I still give them the same gift they gave me for my wedding? Do I give them half the amount? What should they expect from us? We were going to give them $200, but airfare and a hotel stay will cost us like $2,000, plus time off from work. Should the gift amount be the same as they gave us or will they understand that if we gave them less, it would understood that we had to pay a lot to attend their wedding?