Define travel. Car trip, never getting more than a mile from the car? If you can toss all the lenses in the car, then it's a very different answer than if you're going to carry it and have little to no space for it all. If it's the later, then I recommend getting away from a FF camera. Sacrilege, I know. However, for literally half the weight, you can get a very solid 18-135 STM (29-216 FF "equivalent") and a crop camera for less than most FF lenses. Or perhaps even the G3X or G7X depending on the range you want.