i have started a journal and jot down tides, wind, moon, water clarity, dates, times, areas & any notes(ie only high tide places),gps #'s,etc. That will help u 2 b aware and ready when perfect conditions. B/c no 2 people say the same thing, so see what works 4 u! If u are not having any luck, don't hesitate 2 move! @ the places u mentioned u probably won't b the only car n the lot. So u MAY be going behind some1!! It takes practice just like fishing! Attitude is everything!! Have fun!! Look 4 lots of "empty" holes in area, too.
Good luck! If it lays flat(over16") Stick it!!!