Our diving family is new to O'ahu and we are looking for some good shore dive sites. I have a guide book, but one thing I am concerned about is leaving a vehicle unattended while we are in the water. Are there some sites that are considered safe? I understand that no site is completely safe from a break-in, but when discussing a specific site with co-workers, it was strongly recommended that I don't leave an unattended vehicle there. Any input would be appreciated. Thanks.