Depends on type and duration of the trip.
If I am not doing a presentation involving a projector then I take a tablet. I have a larger one which is Pixel C which is a 5V 3A input, or a smaller Lenovo Tab 4 8 Plus 5V 2A. That choice then determines often the charger.
If i am on a longer trip with the Pixel C I take the Powerport 5 USB-C which has one 5V 3A output for faster recharge, but I metered it and it gives only 2.7A vs say the Powerport4 which gives about 2.2A.
For shorter / less work type trips I'd use the Powerport4.
How long I expect to be away from power drives the Powercore decision. I have 3350 6700 10000 26800. Usually the 10000 as compact and enough to handle my typical worse day off-grid, and usually the 3350 to recharge the buds so I get two ports then total.
The necessary number of MicroB and USB-C to the devices and charger.
Spare charger, usually the Aukey 12W tiny one just in case, they also work better than the Powerport4 in cramped or bad sockets, but this week I won the newer Powerport2 which is smaller so that might become my spare.
To go into other different electrical port countries I tend to use the Powerport5 with USA cord and the local country plug adapter. Adapters on wall chargers tends to fall apart.