What more do I need/need to do?

[divingbiker]

If you're staying at the Red Roof Inn in Williamsport, they've got a washing machine (call and double check to be sure), so you'd only need to take 3 shorts and jerseys and could have a clean outfit every day. Washing shorts every evening is iffy, since they might not dry and I wouldn't want to drag wet clothes along with me.

I'd take along a rain jacket, just in case. If you work in DC, I can meet you to loan you my spare rain jacket if you'd like.

Take only one outfit to wear in the evening. You won't wear those clothes long enough for them to get dirty.

Bring along food for lunches and snacks.

I'd bring two tubes.

It's helpful to have a map of the C&O so you know what you're looking at.

Have fun!