... you can't have too much stuff along ... only not enough weight carrying capacity and/or enough room for the stuff.
We bought a rig that had more of both weight and storage capacity than would usually be required for the two of us. We keep it constantly loaded with all kinds of spare parts and "Plan B" items. We can't see having an otherwise great trip ruined, or made unpleasant, or cut short because of "something" we could have easily had along with us. Life is becoming too short for there to always be a "tomorrow" or "another time" to try again.