What pools? Oh, maybe you mean the Snow Creek drainage...a bit off trail.
Your best bet this time of year if probably to take the logging road up from Idlewild to Fuller Ridge. Here's the location:
Be aware that some of the area along the Snow Creek drainage is property of the water authority and they don't like trespassers.
Or park in Idlewild at Humber Park and hike up the mountain.
If you start and end from the drinking fountain at Snow Creek, you could go a little east and take a dip in Whitewater River. There might not be much or any water though. I took a dip in February and was surprised at how low the water already was. I had to lay down to get fully wet. I'm not sure where you'd park though. You should be allowed to park along the road next to the gate.