Welcome to the forum. I've been to some NSTRA trials when the temperature reached well into the nineties, and we did exactly what you're doing. The dogs learned where the water barrels were in a hurry. I'm not working birds this summer but I take my two around the subdivision for a 15 minute run. My pointer knows the way to the pond. She comes in wet each morning.
Quail hunting is like walking into, and out of a beautiful painting all day long. Gene Hill