Teresa
Good to hear from you - Your time with your Dad is more important - it isn't always easy with Family, but I believe they our number 1 priority!
I have read that Japanese Iris, although they prefer wet conditions will suffocate when the ice forms over them in the pond. We put our Japanese Iris into the bog last Summer, so I think we shall see this ponding season. I have not read a lot of about Lousiana Iris, but I thought they too liked the wetter conditions. Somebody with more experience than I have with these gorgeous plants may have the answers.
P.S. - glad you are back.