At least as far as ice harvesting goes, that's a pretty well-documented historical fact that can be verified.

As far as my friends dad being able to ice skate on the creek, it's a bit harder to verify what he was doing 60 or so years ago, especially since he's dead, but he was also the kind of guy who did plenty of crazy things in his day, and that story would be downright tame compared to just about every other story involving him so it's kind of hard to imagine that that was the one he misremembered or embellished, but I suppose it was possible.

And there are plenty of other little leftovers, like several parks and such in the area where the ice thickness is monitored by the park staff because once upon a time you used to be able to reliably skate and fish on the ice.