*Just bring the one pump with the gauge, and one inflator. Three co2 cartridges is plenty. Two tubes is fine. Get a patch kit and try it in your living room if you have never used one. If either of your lights take batteries put in fresh batteries and maybe one spare set of batteries, if they are not too big. If you plan to ride at night consider one small backup headlight and tail light. If you don't plan on it, one set of lights and fresh batteries is enough.
A good Rubel brand bike map of where you are going. And a compass. Walk away from the bike a little to get good readings on the compass. Bring Tylenol or Aspirin. Duct tape. It even can fix flats, and broken racks etc. Glasses with a clear lens for night or dark days. If you don't have one, get a good bike mirror and try it out before you go.