Hey! Your going to overpack on cloths, buy something that is easy to wash and dry over night. Tools, oil, sunblock to get you started, monkey butt, emergency water, shorts and Sandles for when you get off for the day, tire kit, tire gauge and use it due to change in pressure... finally, take tons of pictures with your phone and daily videos of like a personal blog of your trip... I did a big trip last year and still look at them all the time plus to show friends what life really looks like...
Have a great time and spark up conversations with everyone...