The cable lock bow you mentioned is cheese. I had one in my truck until it was broken into one night. They tried to cut the cable and could not, but were able to pry the EMPTY box open with whatever tools they had on them.
I vote *on* body carry at all times (you may have to sit out the waterpark for your families sake) at *all* times.
Time to man up...or leave it at home.
Above is based on the opinion of a 20 year Small Arms Marksmanship and Training Unit USAF instructor with more than 30 years in competitive shooting sports. Your mileage may vary.