Wild Swimming?!?

Hello.

 

My wife and her wife (dont ask) are thinking about doing this whilst at the hallowed base of Sugarloaf Mountain. Apparently, this can be done in the river?

Is this true?!? Has anyone else done this? Does anyone have any info or good references for this?

Any help for her (and her) will be appreciated. Thanks all. 

LESS THAN $ WEEKS TO GO!!!! WOOP!!!!!