There’s so much to share around this idea… 
First, here’s what I call my initial evolution of portable gear. What I carry today is similar, but significantly different.
https://constantine.name/2019/04/26/evolution-of-my-field-recording-kit/
This is a much more recent pack out before a long road trip with multiple field recordings. For this packing, size weight was no object as I was traveling by car…
I’m getting ready to fly in September to do field recordings at an event and I’ll end up doing a mix of those two. A smaller carry on of the more fragile gear, and a piece of check luggage with cables, mic stands and [probably] a collapsing camp table.