Eventually you'll collect enough camera equipment to where you have two bags: one for actual use and travel, and one for transporting equipment.
For use and travel, make it small and easy to carry. A body with lens, and maybe one additional lens or speedlight should be enough.
For transport, look into Pelican cases. They don't break, no matter what you do to them (seriously. Youtube search), and they're nicely organized. Great for air travel. The caveat, of course, is their expense.
Your additional spec for the Macbook makes things a little more difficult, but I'd suggest finding the smallest bag that will fit your macbook and your camera.