Hey littlemountain,
Sounds like your just a short distance SSW of me. I'm watching this storm approaching myself, but I'm not quite in the same dilemna as you are.
Since plants have a good percentage of water in them, and since water changes temperature faster than most matter I would be concerned with moving them from one building to the next. BUT, If you can do it, say, in just a couple of minutes I think you will be ok though. Can you get some help with this? (Recent surgery and all.)
GaGrown has a good idea about making a "chair tent" to keep the integrity of your lighting schedule.:thumbsup:
Good luck, ...wish I was closer, I'd give ya a hand.