When the forecast called for three nights of freezing temperatures, I took some succulent cuttings of particular tender varieties (Sunburst Aeonium, Dudleya, etc.) that were growing in unprotected areas and stored them in the garage and greenhouse. The cuttings will survive just fine for a month or more, growing roots after a couple of weeks. They can replace those plants killed by the freeze when the weather warms up… just by sticking them back in the ground.
Staghorn Ferns are also sensitive to the cold, so they spent a few nights in the greenhouse, where the temperature doesn’t drop below 40 degrees.