How do I carry a camera when travelling?

Here is what the site says about that.

From Travel: Travel: A travel camera has to be good at everything and light enough that you still carry it on day five. Landscapes, food, street scenes, people, the inside of a dim church: you'll shoot all of it, often in a hurry, and you won't want to change lenses on a crowded square.

From Sensor sizes: Is full frame worth it?: For low light, events, and portraits with very shallow depth of field, yes. For travel, street, wildlife on a budget, and most hobby photography, a good APS-C camera with good lenses is enough, and you'll carry it more. Lenses and light matter more than the last stop of sensor performance.

Quoted from this site's pages.