You are allowed a carry-on on the cheech-Mcm flight. It doesn’t count against your weight limit but it has to fit into a 2 cubic foot space so you can’t make it too large. In previous years they have wavered on laptops as a second carry-on. Some flights allow it some do not. I’m carrying mine down, but will be prepared to pack everything into one carry on if I have to. I would probably pack the charger and cables and extra items into the checked luggage and hand carrry the expensive stuff.