Actually.....
The addition of the Lumberjack's Satchel from the Huntmaster quest in Skara allows you to put about twice as many boards into your pack as before. It weighs 3 stone, and holds up to 1000 boards at 50% weight reduction.
So, you could have 1000 boards in a satchel (character backpacks can hold 550 stone, even if you can't move more than a step every 10-15 seconds from the weight) for 503 stones of your backpack's weight (3 for satchel, +500 for the content). this allows you to craft 1000 shafts (100 stone weight) in 1 move. The shafts will be in your backpack, though there might be a glitch (like what happens sometimes with smelting ore to ingots) where the system sees the boards and shafts at the same time and drops the shafts to the ground underneath you.
Of course, this means having most of your other junk out of your character pack when crafting.