I have a party of 10 and was able to get a Hollywood and Vine for Lunch and a Garden Grill for dinner in December. I will be giving up the GG dinner if for some reason a miracle happens and I can get a breakfast. I was online and also calling to double check. I go online a few times a day to see if I can get anything better for us time wise since we are a bigger party we did have to compromise on things. There are other options like maybe your party splitting for 2 smaller reservations close together. Also try the reservation finder on Touring Plans.
I hope this helps!
Annnnd I hope we aren't looking for GG at the same date for breakfast we might have to rumble!