Virtually all my lenses live on boards, but how I pack them varies.
I have a few lenses that I keep on Century Graphic boards (which are tiny) and I can fit six such lenses into a small Tupperware sandwich box. If I'm taking fewer than that, one can go on the camera and two stack one above the other in a 'tall square' shaped food container made by Lock 'n' Lock.
Most of my lenses are on Arca boards, as many as possible on the 6x9 size boards (109/110mm square) with just a couple requiring the 4x5 size (171mm square). The lenses on the 6x9 size boards fit directly to my 6x9 cameras and the 4x5 'field' version, and I have a reducing board to use them on the studio 4x5 and the larger size cameras. This saves
a lot of bulk.
I want to make a reducing board to fit the lenses that are on Century boards onto the Arcas too - anyone got a spare front standard or two from a broken CG?
The lenses on Arca boards live in a couple of cases:
One is a large-ish Lightware 'suitcase' that I have divided up into a series of square compartments that the boards fit: this way I can put in one 'tall' lens or stack two or three flatter ones in each compartment, with a little square of closed cell foam separating them. This case also has compartments that hold some other things, like a Sinar zoom back, a Da-Yi 6x17 back, spare GG, etc.
The other is a wooden case made from an empty wine box - the 'flat' sort that 1/2 doz. claret bottles come in. This is divided in two down the middle and the two long compartments lined top and bottom with foam and the edges with saw cut slots that the boards will slide into. This lets me arrange the boards however they best fit according to the size of the lens on each. There's a lid and when I get round to it I'll fit a suitcase type handle. This is much smaller than the Lightware case, but holds nearly as many lenses - nothing else though apart from a couple of cable releases and centre ND filters.
Either of these might come with me on a trip where I'm working from the car, depending on what I expect to need.
For travelling light the boards go in Velcro wraps into compartments in a LowePro backpack, or in bad weather a couple can go into a larger size of the Lock 'n' Lock boxes. (There's another size Lock 'n' Lock that perfectly holds five 4x5 film-holders.)
Peter