Melissa: also, about requesting a room, here's my advice. I looked at the GV map and decided we wanted to be on a higher floor overlooking the pool, so I called and made a room request. I spoke to a very nice woman in that office; for the life of me I can't remember her name, but it started with "M": Michelle, maybe? Anyway, she was extremely helpful, and she helped us pick out a room request for an area we wanted; she said she couldn't guarantee the room at that time, but that if I called on the Saturday one week before arrival, she would tell me where we ended up.
I called that Saturday and she let me know that although the top floor in the building we wanted was full, she got us on the third floor of that building facing the pool. But here's the thing: when I called that day someone else answered the phone in that office, and I was rudely told by someone with a hispanic accent that they were not permitted to disclose room assignments before arrival. I immediately asked for "M", and she got on the phone and cheerfully told us exactly where we'd be. So you definitely want to deal with "M", whatever her name is.
One last tip: we're actually owners in that timeshare, and it's my understanding that some of the buildings close to the pool are reserved solely for owners. So keep that in mind when you're thinking about calling to request a preference; you might want to have a second or third building option.