More or less that is what I have done. I added a capful of bleach into a large bucket of water and floated the plants in there for a few hours after rinsing them. This evening I rinsed them more thoroughly then in a separate bucket transferred the plants into cold tap water and I am letting them sit overnight. Tomorrow I will run them again under tap water and float them in a fresh bucket before planting them.
I do not want to be overly paranoid but I have two rather well established tanks that I do not want going sideways by introducing something unwanted. Now the LFS I bought this from has his plants in a crystal clear tank, filtered with a nice setup and I am sure it is really good but I did see some snails here and there. That is really my main concern, a colony of tiny unwanted snails suddenly starts taking over.