may i ask how many cars there were ? was planning to go but the risk of break in is making me avoid it...
I think the bigger risk is for overnight cars. I highly recommend leaving no valuables whatsoever in your vehicle AND leaving the glove box open as a signal to would-be thieves that you've left nothing for them. When 25 vehicles were broken into July 19/20th last summer, I noticed that none of the vehicles with glove boxes left open (and nothing of value in plain view) had been broken into.
To answer your question, 3 vehicles in the lot @ 1010 hrs when I arrived, and 5 when I left at 1415 hrs.