Hi, Lorrayne! A family of 19! Wow - that is huge! Good for you to plan for a group this size!
There is no admission fee or parking fee at
Downtown Disney. (Fees do apply if you plan to enter DisneyQuest, go see a movie, experience Characters in Flight, etc.) You can spend so much time here shopping, dining, or even rent a boat! At the Lego store, there is an outdoor area with tables of Lego for your kids to sit and create. My kids love building their Lego masterpieces!
Within walking distance from Downtown Disney is Saratoga Springs Resort and SPA - and the Spa is where I would sneak off to myself after planning a trip for such a large group! :)
Wishing you and your travel party a wonderful vacation in Walt Disney World!