In addition to pdwestman's suggestions, the mileage on the various wear items would be of interest. I don't like to be looking for replacement parts while on a trip. Especially, one as quick as yours. 400 miles a day for four days on roads that are not 70 mph roads. A day or even half a day lost looking for parts and you are out of time.
Anything that might have the slightest potential to wear out or fail should be replaced before you leave or carried with you. Anything you didn't need can always be used later.
Oil and filter change before you leave
A little air compressor and some patches can keep you from wasting a lot of time
Front and rear brake fluid condition and levels. Change if needed
Make sure your battery is in good condition. Have it tested at an auto parts store
A couple of light bulbs might help and keep you from getting a ticket
Take some spare fuses
Zip ties can fix a lot of loose stuff
Take some spare keys
Make copies of driver license, passport, bike title and other important papers and e-mail to yourself
Keep a list of important contacts, phone numbers, and important information in case of an accident on you and e-mail to a contact
Insurance information: health and vehicle