The 24-70 is heavy and attracts attention; the 24-120 gives up a stop but has VR; the 28-300 surrenders light gathering capability and a little wide angle capability, and there are of necessity, trade-offs in a 10:1 zoom ratio lens. But all things considered, the last lens offers the greatest versatility. You may want to consider a WA zoom or prime for the short end if you anticipate a lot of crowded scenes, or even a 35 or 50mm prime for low light. Consider your safety and the potential risk that goes with attracting attention as well. You didn't say where you were headed, I believe. As a Navy vet, I have traveled the world, and there are places I simply would not take anything other than a P&S.