It's thawed. Five days of sitting quietly with heat tape, insulation, with
a garbage can shoved down on top of everything finally thawed the hydrant.
It works fine; nothing cracked.

And it was 3 degrees here this a.m. so it has to be just sitting under all
that stuff without being disturbed for five days that did the trick. Gave
the heat tape enough time to do its job.

Yeah! I don't have to haul 50 gallons of water/day in 2.5 gal buckets
anymore!

Thanks everyone.