At this point, what are your options? Not even try?
I've had 100% hatch rates with mailed eggs. I've had horrible hatch rates with mailed eggs, nothing to do with temperature. So you have that to contend with. I've had some pretty poor hatches with my own eggs collected in perfect conditions, you just never know when you incubate.
But your concern is specifically temperatures. The air outside was around 30 F. I don't know what the temperature was where the eggs actually were or how long they were at that temperature. The eggs themselves are fairly dense, it takes a while for the insides to cool off. Ice cubes do not freeze solid the instant you put the trays filled with water in the freezer, it takes a while.
I don't know if those eggs were cold enough long enough to affect the hatch. I've gathered eggs that were laid in temperatures well below freezing and had good hatches. I did gather them a few times during the day to limit exposure. So I'd give it a try and see what happens.