I've seen pics and videos from your airport track...props to you guys doing good with the facility you have! I've been to Vancouver Island, and it's probaby the prettiest place I've travelled to.
Insurance may be a tad more expensive, but not much more. If no one was badly injured, and no claim made on the insurance, there shouldn't be a problem. My suggestion would be to make sure that every driver and crew member would be told that no one is to start their burnout until a TRACK CREW member gives the sign.
Unbeleivable that the FC guys bailed like that. What a bunch of spineless cowards.