Because you have your own lock and key, you are the only one with access to your storage unit.
Casey's Corner has surveillance cameras that record movements on the property.
Casey's Corner Self Storage owners regularly patrol the property to assure security.
Be sure to check with your insurance agent to determine whether your home owners or general casualty policy covers your possessions while they are being stored. You may need to purchase insurance to cover the items.
It is against the law to store materials that are hazardous or combustible (gasoline, cleaning fluids, paint, hay, etc.) Be sure all items containing these materials have been drained completely before storage.