Hi Gordon
I put my station in one foot container and optional some parts in a second.
The first (4.7 l) contains all except the pole 
. If there is a usable tree or so no pole is needed.
Inside on the top you see the flag (!), the log, some paperwork and …
… thin foam below.
On the left side on the bottom the FT-817, above a short coax, a long coax, headphones and the 2 m antenna and pencils in the front. On the right side the microphone with compressor, two current balun, a bag with a 20 m long OCF dipole and three strings (40 m over all) and a weight to throw a string plus a small box for adaptors. The dipole is ok without ATU on 40 m, 20 m and 15 m.
The optional box (1.2 l) …
… contains the ATU ZM-4 and a “vertical”.
These boxes are nearly a perfect protection, mechanical and against water.
All fits well in my rucksack on the bottom.
The access is easy through the front “door”. There is enough remaining room in the rucksack for things needed during a long mountain hike or for more equipment (PA, accumulator) for a shorter hike.
73 Ludwig