Hey Everyone, Next week two friends and I have wilderness permits to start at Happy Isles and camp above Illilouette Falls. It will be my first backpacking trip in Yosemite. I just want to make sure....Is it reasonable to rely on Illilouette creek as a water source right now? I know the water is low this time of year but just not sure HOW low. Any other advice anyone wants to provide aboutby HappyCamper - Yosemite and the Sierra Nevada. News & Discussion