If you are able bodied, you should have no trouble parking your car at the Landing and walking back to the boardwalk. Last time I was there the parking was free, and I don’t recall seeing a time limit.

Leffingwell Landing is managed by local State Park Rangers along with San Simeon State Park. The referenced grassy area with the picnic tables and barbecues are available on a first come first served basis. If you are intending on having any formal entertainment or music you should contact the Ranger Station at Hearst Castle to clarify at 805-927-2068. They are very friendly and helpful at giving advice and guidance as to what is acceptable uses. If you are looking for a great location where you can reserve the venue, you should check out Shamel Park off Windsor Blvd at the south end of Moonstone Beach. It Is a San Luis Obispo County park. At that location you can set up pavilions, have entertainment, and you have direct beach access. There are many local planners who will make all arrangements necessary if you wish.

Yes. Fiscalini cliffside boardwalk/trail runs north/south. At the north end of Fiscalini you need to exit the Ranch and walk north on Windsor Blvd for about 1/2 mile. You will see Shamel Park on your left (w/children's playground and public bathrooms). Enter Shamel Park to access the southern tip of Moonstone Beach. You can now walk north on to Leffingwell, either on the beach, or take stairs up the 20 foot cliffs to a wonderful boardwalk for easy walking.