This is what I typically bring with me to writing residencies and what comprises of my office at home. This can all be collapsed into one carryon bag very easily - I don't travel for work without most of this.
reMarkable 2
I use this every day as my notebook for everything, because I actually hate carrying around my laptop everywhere. It saves to the cloud and you can read PDFs on it too.
I seem to have discovered the only printer that never gives any issues and can be used on the go. It's a mobile printer so you can use it on battery and on wifi - no wires needed!
FOPETT 2.4GHz Wireless Keyboard and Mouse Set with Switch Button
This is admittedly not travel friendly but it is my home office keyboard. And it makes me happy to click away on, which makes me far more likely to actually get anything done.