It's been 15 years since last trip to Glamis. I never gave it a thought then . I wasn't very bright. LOL!! How much do I need be concerned today? Will be there last week of February.
It was an issue back then also. It's luck of the draw rather than the rule but I think it pays to be careful and spend a few minutes locking up for the night.
I wouldn't leave a generator unlocked overnight. My car is insured so I don't worry about it. But back before I got the insurance I would block it in with my truck so it didn't roll away.