No need to refrigerate, just stick the pots outside! They'll be fine. If there's a hard freeze, I'll cover new lily tips, but we should be pretty good now.
Lisa, I'm hoping to hear from Bill soon re. shipping caladium bulbs. Lilies will be here in time for the spring swap, although I might see if Ednie can ship sooner (next week?) with the good planting weather we've been having.