One more quick note - several years ago I went on a fully supported trip, tour company provided almost everything including bikes. I brought one pannier along from home, just in case I wanted to carry rain gear or anything like that on my bike. One day when it started raining, I ended up carrying someone elses DSLR, he had no way to carry it. It got a little wet, my pannier was not waterproof. My point is, no matter how you carry your camera, bring a thin light weight dry bag along as a backup for those days where you suddenly find you wish you had it.
The camera I bring on bike trips is rated for 45 feet of water depth. If I expect to see some wildlife on a trip, I also bring a second long zoom non-waterproof camera but every trip has the point and shoot waterproof camera so that I have no fear of taking photos in the rain.
...
I recall back in the day that we have found tiny screws in camera bags from Hasseblads, so yes, vibrations are bad and are not good for a mirrored camera, ....
Thanks for the chuckle.