Harold:
Yes, those great plastic boxess from Tuscan, DairyMaid, etc!! I never thought that they could be bought!!
Shelving was "L" angle for the framing, plywood for the shelf bottoms. Crates on the bottom w/boxes. Assorted bins for the smaller stuff.
Then, bought a 'new' van....with a shelving package installed for 'gratis' from the factory. Bins, drawers, cubbies, and the bulkhead behind the drivers seat & window security screens. Rattles,squeaks, & generally noisy.
An excellent point is carrying around any 'extra' weight with todays fuel prices!! Thinking back, the 9400# RGVW van that tipped the scales at 7900# in what was a 'normal stocked' condition. The 'service only' van weighed in near 8k lbs., with the normal compliment of ballasts. That would be a different story on my part today!
