My MIL just decided to join us for a few days at WDW. We currently have an ADR for lunch at Brown Derby for 5 (2A/3C). We will now need a table for 6 (3A/3C). Do I need to call to try to up the reservation, or can we just show up as a party of 6? My guess is that any table that will seat 5 will also seat 6.