Do you want to save the soil? I'd just replace with some fresh soil if it were me. No sense in keeping the old soil, it will just make it heavier. Depending on long the transport is going to be, here is what worked best for a friend of mine. Gently pull the basjoo out of the pot, shake and pry out any loose soil. Get some damp newspapers and wrap the roots and corm. Finally get a garbage bag and tie that to the stem over the wrapped roots. Don't worry if a leaf or 2 breaks, the banana will grow new ones. Tie the garbage bag firmly to the stem and lay down to transport.

Thanks, gardenguy, for your response. However, I have to keep them in the containers, and I am concerned about breaking leaves, as I'll be taking them to a local charity's fund raising flea market and plant sale.

John ,where and when is this plant sale taking place . I'd like to buy one . Rick

John, since you have to lay the plants down and keep them in the containers, I would garbage bag the pots right up to where the stem is at the soil line and wrap tightly. When you go to lay down the bananas, get a bunch of towels or sheets and ball em up. Put them under the stem in a way that allows the leaves to be elevated.

gardenguy - Thanks again. That's just about what I did. I tied the garbage bag around the container, as you mentioned. As the van was copletely full of plants, I wedged the basjoo containers, on a slant, between the side wall and a row of short plants, in 10 inch containers. I used a garbage bag filled with grocery bags as a cushion, in case the basjoo slipped and fell. They arrived unscathed and were sold.
newbirdman - The sale was today, in Staten Island, NY, for the Eden II School for autistic children. However, I have lots more of them.