Iris (bearded ones anyway) are pretty rugged. If you have very many, I would just dig them and trim them, and then store then in a mesh or paper bag where they are kept fairly dry until you get them planted out.

Others might suggest potting them up though, but if you have very many, that could be a major chore with the other plants that should maybe be potted.

Have fun. Do you know if there are existing beds at the new place, or will you be starting from scratch?

Sue...chemocurl

Since you'll be 6 weeks ahead of the first frost I'd put them in bags as Chemocurl suggests.

Thanks for your advice! I will put them into bags.