No not really, only that the thicker chains are far better than a cable. i only take cheap bikes away with us, the more expensive chains would cost more than the bikes are worth.
We get a lot of plant knicked from building sites and have yet to find an effective way of chaining stuff up
As you say - best approach is just to be better than everyone else & you will
Be targeted last.
We leave usually leave ours on the dismounted tow bar bike rack with a solid d shackle - whole lot weighs 60kg or so and awkward to pick up.
When I do take an expensive bike I tend to pop the front wheel off & lock it in the van.
If leaving bikes by the van It’s worth noting that the trailer socket on the van is alarmed, pretty easy to make up a cable loop on a trailer socket & feed it through the bikes. If it’s unplugged or cut the van alarm will go off.