I bought some Hardy Lilies last Fall, overwintered them inside and they will be going into the pond (inside wire cages to protect them from geese, TGC and turtles) in 3-4 weeks.
With my continually fluctuating water levels, I think I'll leave them in containers.
I'm thinking of putting them in mortar mixing tubs, attaching the cage to those and making sure that there is a long rope on them before they get put in the pond. I can push them deeper with a long stick and pull them shallower with the rope.