I have bike commuted for many years, and when not climbing or hiking, I have enjoyed self-supported bike touring. The bike is definitely not a toy, but the motive power (you!) must be in shape, physically and mentally. If I had to evacuate, i might start by vehicle, but a bike would be part of the load in case of traffic jams etc.

It goes without saying that one must be familiar with the bicycle, and be able to handle routine repairs and adjustments.