I just shot two moon images hand held. These show the wide dynamic range encountered. I spot metered on the moon as best could. Shake is inherent in my hands and handheld shot at 90º overhead.  Clouds were all over the moon at this time but soft enough to see it ok.

The top one in the cloud cover was exposed just to the left of the moon with some of it in the frame.  f/5.6, 400IS, 1/5 sec.

The next one was on the moon and the difference was shutter speed being 1/40.  

That is a pretty wide range considering all.   I must take this into great consideration for the actual moonar exclipse.  

I will try to use 300 mm and likely take a few shots with a shorter exposure and then when the eclipse is going well, much longer exposure.  I will use likely 200ISO at f/5.6 or f/8 with tripod.