I used to commute 5 miles in all weather, and even some in the winter, in Michigan. I protected the bottom bearing of the headset very simply with a short length of inner tube, greased on the inside and fit over the bottom cup before assembly. Once the headset was assembled I simply fit it down over the entire bottom bearing assembly. I protected the hubs with silicone seal by forming a ring to cover the locknut and cone and tapered out to the face of the dustcap (no sealed mechanism units in those days. I could easily remove and re-install the seals as needed, and they were very effective. O-rings protected the BB fairly well.