It won't be a problem at all, actually the water will age and off gas any chlorine that will be in it. If your water has chloramine you will still need to condition for that, but if no chloramines you technically won't have to condition the water.
As for adding the fish next Sat your cycle might not be done by then so don't count on it. How are you going to cycle and keep in mind about testing the water daily?
Good luck!