First - This will be my personal item:
My 857d, an antenna analyzer, and a coil of extra coax and power lead all fit nicely in my carry-on. I'm pumped because I hate checking bags, and it looks like I'll be able to maintain my record of flying with only carry-ons while also bringing enough gear for an HF NPOTA activation! Here's how the stuff fits - you cant see everything because some stuff is inside other stuff, like shoes: