I would encourage you to file a report, even though there appears to be no damage or property missing. Again, it will bring attention to the area. Could be it was a homeless person looking for a place to stay, and maybe checking the cabinets for food or valuables.
I'm not sure I'd feel comfortable leaving mine in any unsecured storage area on your side of the state. You might also consider moving it even in the same storage lot. Who ever entered would then know the entry had been discovered if he/she comes back. As was stated in an earlier post, there are only a handful of different keys for the standard door locks. You dead bolt is a bit more unique. If both are locked it would be harder to get in.