Us too. Low of 27 overnight forecast and was just thinking about this stuff -- thanks for resurrecting the thread, gardengramma!
On the upside it looks like the freeze will be brief -- just tonight and then back to warmer temps tomorrow and for the next several days. The really bad freeze five years ago was more than one night.
Spring started even earlier this year than five years ago, past the point where the freeze happened but earlier in the year. We're pretty far into spring right now, leaves everywhere (lilacs, magnolia, Japanese maple, etc).
Will be covering the Japanese maple with a tarp as soon as the sun goes down and keeping fingers crossed.
Good luck to everyone else dealing with this...