Mike, I have them and I would say they probably are going to be too bulky to ship. Especially if they have been put up and then taken down.
They are not trivial to ship if still in the original cartons and unopened. FWIW as I recall, someone in NY had three brand new sets still in the box, and mentioned it took at least two loaded trips in their pickup truck to get them home from the store.
They could probably be shipped.
There is a (.pdf I think) file of the assembly instructions floating around on the net. It might show the sizes of the barrels before assembly.
BTW this is the company that designed the store displays that year. http://www.InnoMarkCom.com/