Hello, it really sucks without Phil Foster park, when they are done I have been told they will keep the area under the bridge for non motorized boats, we'll see... Up in Jupiter I spoke with Park and Rec and the guy just said he put the chain up because he wanted too, pretty lame. I didn't ask about a spot on the beach though. I usually leave town when using my cat, have you been to Sebastian State Park, Stuart causeway, Delray Beach(also no parking). Out by Sebring they have some nice lakes but not sure about ramps. Locally lake mangonia in WPB is ok.
Check out 1design.net for regattas which are all over the state and fun, that's what I started doing. Maybe someday Palm Beach County will realize how much money is going out of town due to not being cat friendly.
What kind of cat do you sail? I have an old P18, but it works fine.
Good Luck