I think I'll be ready to move my Caffenol photography to the Rollei soon.
I don't know why it hadn't occur to me the first time I posted to raise the contrast to cover up some of the fog. Although this image was generally dark enough (thin negative) to not show fog as much.
See a Before and After example below:
No Contrast Adjustment
With Contrast Adjustment
Of course I rarely have to do a contrast or brightness adjustment to my B&W images, because I 'adjust' my contrast in camera using filters. I do Have Filters for my Holga, but it seems strange to use them.