RE: CONFUSED!!
Turtle, sorry, got no photos, but this is how I secured those '3 drums on a pallet' loads: 2 long ratchet straps, each wrapped aroun the drums, and secured on opposite sides of the pallet - meaning, in front of the skid with the first, behind with the second. The countertension keeps the drums immobile, and a 2x6 board, between two sockets in the etrack, keeps the skid from moving, too.
I haven't had a bunch of those loads, but a few were long distance, and they always remained upright throughout.