Hi!
We specifically requested Room 3063, which we had on a previous trip. The room wasn't anything special, but it had the great view of the Boardwalk, lagoon and Illuminations... and there is only one other room at that end of the hallway, plus it had a back elevator that went down to the laundry room and back exit right by the YC marina.
By 306# I meant rooms 3060,3063,3065, etc...(the odd numbers would be the water view side of the hallway.)
WDW honored the request, I don't know if it's standard practice but we were on the Grand Plan plus it was our 5th anniversary. We also Disney-ed on our Honeymoon and 3rd anniversary, so maybe they were just being nice...?