Best option from 30–60V to 3V3
I'd use a buck converter direct down to 3.3 volts but, if the data logger is something valuable then I would also use a protection circuit so that if the buck converter went belly-up, the protection circuit clamps at (say) 3.6 volts or whatever is the upper limit for the data logger. It's called a crowbar circuit and it can be a useful insurance policy. Because a crowbar is also a shunt regulator it would do nothing until called-into action by the failing buck converter. You'd also need a fuse so that if the buck went short circuit, a gazillion amps wouldn't flow into your logger/crowbar circuit.
You'd probably decide to use a fuse anyway as a fire risk precautionary measure.