"having to take the reading and then transfer it to the camera,"
Ahh. I have just experienced this problem first hand, in a moment when eye, hand and brain were not connected. I was taking some family photos outdoors, using the cds meter. Lighting called for 1/125th @f16, but I forgot to set the shutter speed on the body of my Mamiya, which I now realize was set at 1/60th. The good news is that it was a bright snowy day, so developing for the shadows might still save the shots. I'll have to give how to do that some thought. Any advice?