Thanks everyone!
That's exactly what I'm looking for, Skygirl. One of the reasons we're doing a DW in the Caribbean is to cut down on our own costs, but we don't want our guests paying through the roof just to attend.
From what I've seen on forums here and elsewhere, though, it does seem like there's definitely less expensive options in the DR -- I'm hoping to have each person pay $1,500/taxes in, tops.