I don't have any experience with that, but if I recall correctly, someone here on the forum had a similar situation. She bought one of those hard plastic baby pools, placed it on level ground, and added all her potted daylilies in and added a "little" water so that all her daylilies could stay hydrated. They did fine until she could get them all in the ground. I have done a smaller version of that with some I received that arrived at the beginning of the week when I had to work and could not get them into the ground until the weekend. They were bare rooted and I set them in some very shallow water (I added Hydrogen Peroxide to it) and changed the water out every other day. They did fine for a week until I could get them planted up. But I don't know how long they could last doing that?