Yes.
Not sure why you would need overnight parking at a Costco.. But not really.. Its not like you are likely to get towed if you do park overnight but the local police are within their rights to order a towing service to tow away your car if they do get a complaint against your parked vehicle there or if the police on duty patrol that parking lot and find an unattended vehicle there at your cost.. There are a couple of bars within that area you could park at after having a drink or 2 at the bar so you become a customer of that bar who called up a ride and left their car behind..
May not be available
Overnight parking is probably not allowed.
Helpful lots
No
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