I hope you’re good at doing things by braille. When I tried it, the vis was so awful that I could barely read my illuminated wrist computer. When I tried to use my dive light, it actually made things worse because the light reflected off all the little pieces of crap in the water. I was able to determine that my gear functioned, but that was all. Climbed out after only 8 minutes. Keep in mind that I was diving in one of the tributaries. You might get slightly better vis in the deeper parts, but stay away from the river mouths and definitely avoid the dykes where the warm water re-enters the main lake.