I got my taste of coal when I was passed by the coal powered steam engine, that runs tourists around, just before it went into a tunnel. I rode into the tunnel, thinking I could hold my breath and get through but the tunnel was plugged up with coal smoke and I couldn't see a thing. I had to move at a crawl getting through the tunnel and came out coughing and sputtering from the irritation caused by the coal smoke.
In Cumberland, we made the decision to portage down the C&O trail and arrive in DC a day early so that we could be tourists for a day. Finding a campsite was a huge ordeal but we finally found a pretty spot along the Potomac where we were able to swim and enjoy a great firefly show.