Changing crankshaft bearings with the engine in the car.

413 said
I bet the cam bearing wear is half as much or less since it turns at half crank speed, and has a constant load.

Crank bearings do much more work than cam bearings.

You'll be fine doing it in the car, old bearings come out easily. Change the oil pump while you are in there with a new standard volume pump.
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Tom Hoover once said , in a Chrysler drag seminar in OKC , that cam bearings can look like hell and never give a problem . I suspect there are a lot of them replaced that don't really need it , I have never worried about them unless the block has been vated ...