What bag should a man take when traveling?

If you travel, you'd better carry a backpack, which is not troublesome and the suitcase is not convenient to carry. If the road is bumpy, you'd better take a backpack.

I usually travel with a backpack.

I don't think I need a backpack if it's a short trip and it doesn't stay overnight. I put my wallet in my pocket. It's easy.

But my friend said that I don't bring my bag every time I come out, which is great.