If the AP won't work for you, you should also look into the
tables in wonderland card (TiW). It's 20% off, includes alcohol (the only disney discount that does alcohol) and you can get up to 9 guests + the card holder discounted. I know the card holder doesn't have to be the one paying the bill but I'm not sure if dividing up the check for multiple payers would be allowed (never tried). The tiw card holder does not need to be the one paying for the discount but the card holder, tiw card and their id need to be present to get the discount. There is some places that it has a discount that AP doesn't and vice versa so check the list. Also note the blockout dates when you can't use it to make sure it'll work. With a party of 10, it'll be very fast to get the cost of the card back and save some money.
There is also a little known option that they will issue a "spouse" card for $50 more giving you 2 tiw cards to give you some splitting up options where maybe your significant other might be able to utilize the card without you. You can actually get the 2 card holders + 18 guests if both cards and card holders are present on the discount.