Large circuit board storage

I recently picked up an E10k and an Onyx rack for spares from one of our own and am pondering how to most safely wrap and store the Onyx boards and, in particular, the E10k midplane. I don't exactly have an anti-static bag of that size. I once read that tinfoil works well as it helps dissapate the static energy by spreading it over a larger surface, or something like that. Not sure about the validity of that, of if there are better options. I was then thinking, once appropriately protected, I'd simply keep them in decent sized cardboard boxes with some kind of foam at each end to stop them from slapping up against each other (providing tension to hold the boards upright). What does everyone else do for storing naked boards? Cheers; - JP