Hi dsut.
On the first point, there are some fantastic dual harnesses out there, some at ridiculously low prices! No excuse to disrespect two expensive bits of gear by allowing them to collide!
On the second point, is a complete failure having to power off and back on between each shot? If so it happened to me on a very low mileage coddled and loved 40D early in my digital "amateur career". I will not be more than a reasonable walk from my backup (old) body, if the event involves park and ride "long difficult to return to vehicle" and is a rare occurrence I carry two bodies.
As for unlucky it could just be a D'oh moment that leads you to grab the second body rather than miss a shot! :-[
Cheers, Graham.
dsut4392 said:
The benefit of not having to swap lenses is often outweighed (pun intended) by the nuisance and discomfort of having two cameras dangling around your neck clacking together.
And you would have to be extremely unlucky (or clumsy) to need a 'backup' body - touch wood I have yet to have a complete camera failure in 25 years of shooting, including some pretty hostile environments (e.g. skiing, climbing, canyoning, kayaking, deserts and jungles, between -28C/-20F and +51C/+123 F).