I worked at BMW Canada up until recently. There's a security guard at the front desk 24/7 watching video monitors and they call the cops on people after hours all the time.
It would be best to have everyone park on the south side of Champlain in front of the dealership, so that it won't interfere with their private property.
Randy - is this coinciding with the FBMW race at Mosport? If so, and you're dealing with Johanna, PM me.
Daily: '06 S4
Wife: '05 X5 4.4i
Fun: '95 325is