I'd definitely carry a roll of Eternabond tape and a quality caulk gun ($15-ish for a dripless unit) and a couple tubes of Dicor, along with a roll of Butyl tape.
Some quality duck tape too.
I have one of those reflective vests you see highway crews wearing, they only cost a few bucks. I'd add to that a package of the reflective triangles (don't buy the cheapies, they blow over too easily, get the ones the 18-wheelers use. Harbor Freight sells some battery powered RED flashing light things, they only cost around $5 or $6. I have some and they are awesome. On that note, plenty of flashlights and electric lantern, battery powered (around $10 at Harbor Freight. A weather radio is a must. Buy a larger and better fire extinguisher, the one you have now most likely is the size that will barely put out a cigarette butt.
