Dave, all my trees are currently in an insulated shed supplemented with an oil filled heater on a chill plug (35 on 45 off). Lately, they have been held in the high fourties to mid fifties temperature range. On nice days I been opening the door getting some fresh air in and preventing overheating. Some of my trees are just now beginning to show some bud swelling. I am thinking of starting to move the trees that are waking up out probably this comming Sunday. That Saturday nite temp is still a little chilly to chance it. I have two 6x8 growhouses that I will shuffle into as needed as well as the shed for really cold nights. As you know this time of the year it is very tricky. You really have to keep a close eye on those overnite temps. Another big issue on my corner of the state is the wind. That cold breeze off the ocean can really set you back. Good luck.