Nick, thanks for posting this. This looks like a streamlined, practical system put together using readily available materials and one that could be very versatile. I suspect your version comes out considerably cheaper than commercially available versions.
https://www.uline.com/Grp_351/Bulk-C...B&gclsrc=aw.ds

One thing I really do like is the use of commercial pallet covers (large cube shaped bags) both inside and outside of the kind of large boxes that you make to provide a more stable environment.

https://www.uline.com/Grp_126/Pallet...s=Pallet+Cover

These products are available from a number of sources. I am not in anyway endorsing the use of Uline. Many purchasers
consider sourcing materials for use in their institution to be an expression of ethical consequence (why support companies that support political agendas harmful to cultural institutions?). Just sayin...