First of all, availability is not a function of payment. I assume by "free" dining, your are implying that you will be on a plan. But people who are not on a plan have no greater ability to make an ADR. As for your question, generally, you have to go through "the system". However, certain hotel restaurants, particulary those at the Swan and Dolphin, will talk to you directly. If you are looking for nice dining options, I would suggest trying Bluezoo, Il Mulino, Kimono's or Shula's. Just call the hotel and asked to be connected to a restaurant and you will soon be talking to a host/hostess who can take a reservation right then and there. Other than that, making direct reservations is usually only possible if you have the business card of a restaurant manager or maitre'd and they invite you to contact them directly. This usually only happens if you are a regular (and tip well). I have a few such numbers (all from resort restaurants, none in the parks), but I can tell you that even taking them up on their invitation to call them if I have trouble getting in, I have only been able to squeeze in a reservation rarely, and only mid-week.