Mr. Leadbutt, I live down in southeast WS, off of Kernersville Rd, and commute to Greensboro a few times a week. I have the route down to 15 miles and have found a perfect back-road route that avoids all the major traffic hassles.
I leave as soon as the sun comes up and I can see. I've had pretty good luck with traffic, one incident involving a soccer mom and an unruly youth but nothing serious. I have found that if you take some time and find a route that avoids traffic it makes it a whole lot more enjoyable ride.
I'm not real familiar with King, other than going up for the flea market I don't get up their much. I have ridden through and as I recall the roads were not bad.
I would find a route and try it out in your car one morning and evening at the time you would be riding and see what its like. Then give it a shot. I think you'll find that you have a much better day when you start it off with a ride.
Good luck. Shoot me a message if you'd like to talk or get together for a ride.
Dave