Interesting point about the stopping distances mate. The general rule of thumb on the outback roads is you give the right of way, and the road, to the road trains...too many wheels to be throwing up stones...be like driving through a hailstorm. As for stopping...each wheel has it's own brakes, albeit a drum brake, but each wheel has more brake surface than an entire cars brakes. It would say to come to a dead stop from 60 kph (about 37 mph) they would need 100 metres (about 110 yds). Their braking capacity is really dependent on the grip of the tyres...they can lock all brakes with ease.
Beer on tap around the fire...you've won me Suz...be awesome. We have that capability here at home...might have to investigate it.
Beer in a Bin
Scroll through the pics at the top of the page.
Here ya go...plans for a beer cooler.
Jockey Box Beer Tap Cooler
I reckon with a combination of yours and my tinkering abilities we could build a couple of these with ease mate.