I would go on the GF specific thread, they were very helpful giving me location suggestions for our stay last year.
For requests, make sure they are noted on your reservation. I've heard too that specific room #s aren't a good idea, but just to state what you want! a Castle View and which building you prefer, perhaps also which floor- upper or lower.
List in order of importance and keep it simple. Room assignors try very hard to accommodate you.
We didn't like our first room, because it was a Dormer room. That was the only thing I didn't want
I asked at the desk, and she said no, it wasn't,but when we opened the door, it was!
So if your room isn't what you want, DON'T touch anything, and go back down to desk immediately, and nicely explain the situation and ask if there is another room available that fits your requests.
The first thing they'll ask is if you've touched anything
We did get another room that was wonderful.