Storing tube gear


I have to put my tube monoblocks and tube line preamp into storage for a few months. Should I leave the tubes (power and input) in or remove them? Mechanical damage is not a concern since the gear will be stored in a storage facility, most likely with air control, and I have the original boxes. Any advice would be appreciated.
actusreus
Lewm makes a good point. Leave 'em in. And so does Azjake, esp. if you live in an area with extreme temperature swings (seems like that applies to all of us, lately).