Are they near a food source? Don't worry too much about water, while coons are found near water a lot, plenty get caught with no water anywhere near by.
They're looking to fill their bellies with winter coming on, so set up the food (corn)!
"Knowing when to shoot and when to wait is one sign of maturity in a bowhunter. Be patient and pick your aim point carefully." ~ Randy Ulmer
"I suppose it's the way of hunters. We are very odd fellows." ~ Peter Hathaway Capstick