Hi Dan, thanks for the link - I am thinking to dive in Blue Heron Bridge (Florida). I left a comment in the thread that you attached.
For Southeast Asia muck diving, I have been doing muck in Lembeh, Bali, Dauin and Ambon. I stayed at dive resorts that friendly to UW photographers in Lembeh and Ambon. I am sure there are UW photographer friendly resorts as well in Bali and Dauin. Personally, I think a good and experienced dive guide/master is crucial when going for muck diving. Without their help, it would be tough to find specific critters.
I was super happy with our dive guides/masters from the resorts where I stayed in Bangka, Dauin and Lembeh. If I ever return there, I will look for them