I would say hit the dusting area first thing in the morning till about 10-11 am then move to the water around noon provided the temp moved on up. Reason I' m saying that is on our recent trip to Tx there was a water tank next to the camp a couple of 100 yds away(the next closest one was over a mile away) and the birds started moving in on it around noon and stayed around it until 2 or 3 feeding close by. In fact there was one hen for two days in a row slipped out there and started doing an assembly call and for about the next 15-20 minutes birds were pouring into the water hole. Just my experience.

" May yur Beards be Long and yur Spurs Sharp"