Oh, that Hikin’ Jim guy. What does he know?
However, that said, I do have some individual maps for some of the camps if they’re of any help:
Limber Pine: https://caltopo.com/m/RM8R
Limber Pine is a cinch if you haven’t been before. Continue on the trail as though you were climbing toward San Bernardino Peak. At the “elbow” of the first switchback, there will be a little drainage just ahead of you. The spring is in the drainage, maybe 10 to 15 feet, something like that, upstream of the closest point of the trail to the drainage.