magilla
i have parked my car in the lot that is attached to the boat ramp, i was there fishing on my friends trailered boat, i did NOT have a sticker on my car and i received a parking ticket. i was told that it is parking for car and trailers only and you need a sticker to park there. maybe during the week you could get away with parking there, but on the weekends you will probably get a ticket.
you should checkout the cartopper launching ramp in the park, if you come into the park the back way, about 250 yards after entering the park, it will be on your right side and there will be a sign.
i never checked it out myself, but i see people with car top boats going down there to launch. worth checking out.
go to millers field and get a permit to fish crookes point, this will allow you to also have access to the area near the mouth of the harbor, you could launch from that beach as well, a short walk to your car.