I have a spray top I can bring, as long as my wife doesnt want to wear it you sister is welcome to it. Forecast is looking good though, upper 70's for temp and mild winds.
Jordan lake water temp data can be found here, updated daily.
Water temp was 77* yesterday
http://epec.saw.usace.army.mil/bejrept.txtPS - what time are you guys heading out on Saturday?