Trail's End Family Meal with Dining Plan

[PAGA2003]

We will have the dining plan on our next short visit and are considering spending an afternoon at Fort Wilderness for a carriage ride and to enjoy the outdoor activities there. I understand you can use two QS credits for the Family meal but do those need to both be adult credits? I was hoping to use one adult and one child if possible since that seems logical when feeding both adults and children. I appreciate any insight! Thank you!