We have a large group (varies from 22-27 people) going in November. I was able to book online for Biergarten (24), Chef Mickey's (24), Crystal Palace (27) and 'Ohana (22) and at Akershus (16). The buffets seem to have the best availability for large groups. What I did was put in the number of people for the reservation, select the date, then selected dinner (instead of a particular time) and a small group of restaurants would show as available. Most restaurants would say that our group was too large for that restaurant but the above as well as the dinner shows usually showed up as bookable options. We are going the week of Thanksgiving so I was online right as the reservations opened on my 180+10 morning. I know that we will probably be seated at more than one table, but since we are one reservation, hopefully the tables will be close to each other.