Not a bad hike but be sure to bring enough water. From the Rainbow / West Fork trailhead it is about 5.2 miles each way.
The path to the hot spring can be found between various l Camp 6 and Camp 7. The water is a little over a foot deep, and about 100°F -- perfect for relaxing in for hours 😌
If you're really still, you might have some visitors. I had a chipmunk jump onto my exposed knee; and then had a pair of marmots visit 😄 No issues with annoying bugs.