Maybe turn your attention toward businesses close by that have working cameras and if you have a window in which it was done ask them could you view the footage, long shot but we had to do this where I work when someone stole a generator before we installed the security system.
Op has good amount of brass. This coming from a guy with a lot of brass...just put an ad to buy brass or call metal recyclers. You will find your thieves.
Storage facility didn't have cameras? It would have taken a lot of time to load that much stuff. If they have cameras I would check the guy watching them. How else did they know to only hit yours?
May also want to print copies of your list and hand carry to all the local pawn shops.