My family and I went during the Summer of 2012 (with kayaks) & Summer of 2013. The fishing was good almost all day long till the heat beats you up.
Salton Sea has been a lot cleaner & "fresher" these past two Summers. There was rarely any dead fish laying/floating around, the bad smell went unoticable, but the summertime fish stayed the same, WFO.
Heres a Tilapia from this years trip:
Fun to catch on the trout rods.