Dpending on the unit, sometimes by that time of year the monsoons have passed and most of the water can be dried up in the smaller holes/depressions that can hold water. Tanks are always a good idea, but you may also be competing with other hunters on thse tanks. I have had great success hunting in a blind or treestand on some of the trails that lead to the tank. However, the only way to figure this out would be setting up a game cam, to see which trail is getting hit the most.
Glassing can be productive earlier in the season to pattern those bucks, but once the hunters hit the unit, things can change drastically.
What unit are you hunting?