This is just another one of those imponderables that will never get settled. That is, until the ultimate do-everything camera is designed, and it only weighs a few ounces, and costs less than $500.
But for now, I believe the size of the sensor and camera needs to be matched to the task at hand. On a trip where you aren't going to have time for any serious photography, then snap away on the phone or cheap compact. It will be good reference material for later adventures, especially if one gets the chance to return to the area.
Waiting for the light