Setting shipping containers on blocks

The Tennessee Tilt can place containers exactly where a customer needs them. This video shows an exact placement of a shipping container on blocks for a customer.

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That helps me visualize the delivery process but my blocks are a more complex arrangement. The land slopes both downward and to the back. So I created stacks of blocks of different heights so that the tops of the block stacks are level with each other, but then I have several delivery issues to contend with: 1. The front stacks have to be moved aside so the truck can back up over their locations and drop the back corners onto my rear block stacks. 2. Since the truck will be flat on the uneven ground but the block stacks are leveled to each other, one of the rear container legs will rest on a stack while the adjacent leg will still be several inches above its assigned stack. 3. As the truck pulls forward and the container gradually slides off, eventually the container will tilt onto the second rear block stack and one of the front legs will lift off of the truck bed. 4. When the container is almost at the end of the tilt bed, I will need to put the two front block stacks back into their assigned locations. Then the truck will need to drop the front end of the container onto the front block stacks. Again, the two front block stacks are level with each other, but the ground between them isn't. So, one container leg will contact its stack before the other one. I'm thinking that I'll need to attach some cables to the rear of the shipping container to keep it from moving off of the rear block stacks as the truck moves forward, as for awhile only one rear leg will actually be on its block stack and I'm worried that there won't be enough surface friction to keep the container in place as the truck moves forward. (If it slides forward even a few inches it would either fall off the stack or topple the stack and land on the ground. In either case I would have a failed delivery placement and I have nothing that would allow me to recover from that.) Anybody have experience with delivering a 20ft container on uneven ground onto leveled stacks of concrete cap blocks?