I would book it and then add as Dana has said.
You can always cancel the reservation without loss of deposit up to 45 days out if they do not announce fall free dining plus this guarantees you a room at the resort of your choice.
We didn’t book for this fall until free dining came out and were locked out of our first choice POFQ and had to take POR instead. Not that we are disappointed (we are going to Disney!) but we were locked out.