I recently trimmed my 4x5 travel kit, which is now at 15 lbs:

Ebony RSW 4x5 (stowed in Stone Photo Gear camera case)
Nikkor SW 75/4.5, SW 90/8, W 150/5.6 (held in Stone Photo Gear lens case)
Focusing Bellows w/Ebony Loupe
Linhof 4x5 Multifocus Viewer for scouting (not for the camera)
Linhof Right-Angle Viewer (top only) fits in focusing bellows for use in bright sunlight
PocketSpot light meter
Lens wrench, shutter cable, lens cloth
Tenba Fulton V2 16L backpack
RRS Series 1 tripod with Acratech Leveling Base & Quick Release Clamp

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I forgot to add my Triple Sleeve with three-4x5 film holders.
They are kept in a drawer with darkroom tools, and I do not pull them out until I load them.
I have a large Domke Journalist bag with about twenty-five film holders in my gear closet.
I usually only carry three film holders to a shoot, as I do not take many photos, only compositions that I feel are worth the effort.
If I know I will be traveling to more than one location, I may bring more loaded holders and leave them in my campervan until needed.

I am a petite female and will not use a bag of more than 20L.
The Tenba Fulton is a rear-loading bag which I prefer.
It holds everything I need with room for expansion.
This tripod is considerably lighter when compared to my RRS series 2, with a pano head and leveling base.
I also use a Fotopro E-6H Eagle Series Gimbal Head with this same tripod when shooting panos with my ALPA and Hasselblad digital kit.
It has been an excellent versatile tripod setup.