How would I reserve 3 units in the...

How would I reserve 3 units in the same building? We have 10 adults, 9 children

Once you have reserved your units, you call the resort and tell them you have 3 units and want to be in the same building. We've been doing this for years, and have always been accommodated. However, sometimes, we are not all 3 units on the same floor--which ends up fine since grandparents like a little bit of separation :)