If there was one overnighter to rule them all in the superstitions, this would be my pick: [ Route Editor ]
In the next two weeks most of the flowing water will be dried up, limiting your camping options unless you want to carry a bunch of water. However, you will find water at Charlebois Spring year round. 2nd Water Spring is also pretty reliable.
Just be aware that the campsites right next to the springs can be pretty competitive any time of year; they are also where the big groups tend to go, so you may have a noise problem to deal with. You will probably get visitors walking up who have the same idea as you, probably there to get water as well. What I do normally in the dry season is do my hiking with a couple liters of water, walk up to the spring - top off and collect for a total of 5 liters and then camp another mile or so down the trail where I won't be bothered.