There's a storage company in West Wendover that has both "traditional" mini storage units -- and open area inside a fenced area. Nancy and I have stored in the mini-storage area. I think the SCTA/BNI stores stuff in the open part, and I expect there'd be room for anything you've got - although moving a shipping container in will take a bit of coordination. I'll think of the name of the storage folks pretty quick -- or you could contact the West Wendover Welcome Center and ask them for the name of the place. Email to ksupanich@westwendovercity.com and ask her for help.
Also -- Mike Crawford is the owner of the CarQuest auto parts store in Wendover, Utah -- and also the chairman of the City Commission there. He'd have some information, I betcha. I don't think I've got his email address -- but you could look up the store by using a search engine and writing/emailing/calling him for help. Or go back to the Welcome Center idea -- the email addy I gave you is that of his sister, Kerry. She'll know how to contact him.
Best wishes on your long trip (Bones) and your not-so-long-but-still-pretty-danged long-trip, Max.