I have the same question. I used a TA for my first trip, and she just phoned DCL to get the rooms I wanted. However, I noticed on sites like Costco or Expedia, etc, they don't have as many rooms to choose from, so even if your desired room shows as available on the DCL site, it might not be on their site. Can they just phone DCL and get your room? Will they? Just how reliable is a big company like that?