I'm planning a 340 mile pittsburgh-to-D.C. bike trip along the allegheny/c&o canal bike trails, and i'm planning on camping most or all of the nights --- i'm getting a super lightweight tent to carry with me...

what advice do the experienced riders have for a newbie? the longest trip i ever made was 72 miles in a weekend when i was 13 from cumberland to DC... and it was a great time, so i want to do it again, only this time -- a longer trip, now that i'm 23.

advice for safety, morale, how to carry supplies (light backpack a bad idea in addition to bike pack? what sorts of bike packs are best for weight distribution and carrying things?), advice regarding safe diets, safe travel, and anything else you can think of as "basic" and important for me to know.

i want to leave in 2 weeks and i'm planning now. there's only so much time before i have to get a new job.