I think the tops should be cut back quite a bit, and for transporting I would use heavy duty garbage bags to put the root ends in, with some additional soil, watered but not completely soggy. When you replant them, dig a larger hole than they need (say, at least twice as big) and be sure to water very well, and continue to provide water for the rest of the season. And if your weather is very hot, providing them with some shade would likely be helpful. Anything that you can do to reduce stress will increase their chance of living
