+1 on carrying spare clutch cable. We went on a supposed 3-day ride and the cable broke on the 1st day, ending our trip. We were near Sacramento, which has about 4-5 Kawasaki dealers within 40 miles, but none had a cable in stock. Since they are a relatively chronic issue, it is best if YOU keep one in stock and carry it with you (mine's under the seat). Even if you don't know how to change it, any bike shop can do it if you've got the cable. The Versys is very tricky to ride without a clutch, especially 2-up.
We went cross country (7600 miles, 26 states) last year and the best peace of mind was having AAA premium road service, which is the only level of coverage that includes motorcycles. It cost us $28 to pro-ratedly upgrade our standard coverage. We didn't use it on the bike trip, but when my truck broke down 250 miles from home a few months later, it paid for 3 days of meals, lodging and rental car to get home.
Most of all, have fun!