Hate to be a killjoy but see to it that you get a container that is in good shape and use a LOT of moisture collector! A friend of mine got a 70 Challenger shipped to Finland, it is a full nut and bolt resto using mostly NOS parts. Opening the container was a shock. The car had mold everywhere in the interior and all natural parts had a thick coat of rust. The moisture collectors could not handle it all. He is still dealing with that stuff a couple of years later. It's a nightmare.
I am sure a lot has to do with the placement of the container, the condition of the door seals as well as the weather. Even if it is likely to go well do make every possible pre-caution possible! I'd hate to see that car get damaged in transit...good luck!