Old Blue Mountain is good, there are several neighborhood accesses that are walk up with no parking but not too many houses and there is some public beach along there. Old Florida Beach is gated and not too many houses with lots of beach. Seagrove is slim pickens with no crowds - you can look down the east end of Beachfront Trail. Inlet Beach Regional is on one of the largest accesses but can get a bit crowded. Gulf Trace is good but I think there was some recent stuff about beachfront owners being Aholes and trying to claim they own all the beach there so check with rental agents you trust.