It was a nice 62F Saturday afternoon (after waking up to 19F on Friday) , so I went to check on my poor trees. All the 2.5 gal sips and 5 gal buckets were frozen solid. Couldn't push my moisture probe into the soil at all.

Any chance of survival? Perhaps just frozen around the edges but still okay in the core of the root ball? Wishfull thinking?

Today (Sunday), they are all thawed out.  Moisture level looks good.. not too wet.   It's going back down to 22F Monday and Tuesday nights.

I have heard that they will recover, but probably a good idea to add some heat so they don't do freeze-thaw-freeze-thaw-etc.

Usually happens to me a few times in the winter, normal winters maybe just once, this year has been colder than usual so we will see what happens.

I made room in the garage for a few days. The 20 gal pots will have to stay out though.

Moved everything back out to green house a few days ago once the weather warmed a little.  This morning I saw some near microscopic green dots just above the leaf scares on my Hollier in a 5 gal bucket.  And the Strawberry Verte in a 2.5gal sip has two terminal buds that are starting to open.  I guess it wasn't as bad as i expected. :)

Yes as Jon P said.
Here in our cold zone it regularly gets in the teens in garage where figs are stored, one year i kicked one of the pots 
like kicking a car tire and it cracked the pot.

This year temps were brutal but fig plants will be fine.

As a note i use regular growing containers nothing fancy about them.

James - that's good to hear!  I won't know for a while what damage, if any, mine sustained - fingers crossed.

I check on them again today.. Definately getting some green nodules on several.   Even a tiny Golden Celeste I had in a 2.5gal SIP, that got knocked over when the green house flew away the 3rd time.  I picked it up out of the spilled media, set it back in the more than half empty pot and kind just pushed some of the media over the roots (not many roots).  A week or so later, I added a little bit more media because it looked so pathetic.  Now it looks like the terminal bud is about to open.  Amazing!

This winter has thrown a curve ball at many of us.  This has been the longest persistently cold winter that I can remember.  I didn't notice any record lows but it seemed to be that it was cold every day since mid November.
My covering got torn off my in-ground figs.  Given the record cold it will be interesting to see how bad they got damaged this year.
Also in the unheated barn the temperature went to -10C (14F) for long periods.   This means my figs in the barn will also have been injured.
In the past my figs have always had some damage but they have recovered nicely and still produced a few brebas and the main crop. 

Luckily for me I took cuttings of most of them in November so I can grow replacements just in case.

My Negronne (20 gallon), Bataglia (20 gallon) and Calliope's Red Greek (7 gallon) were frozen solid in the garage however the temp never got below 19f. Most of the time they were in the mid 20's when it was cold out. They look good and I think they will perk right up when it gets warm.

In retrospect the Calliope's Red Greek Fig I have has been growing in ground in south eastern Michigan for 70 years+.

My figs are in typical wood wine barrels. I mulch the top and cover the trees in moving blankets. They can freeze in an attached garage but they do just fine.