Assuming that your route is something like what I've plotted
on this map, then there will
probably be water at
"D" -- near Laws Camp
"E" -- which is a little creek flowing down the side of the hill just north of the trail. I think this is called "Connie's Creek"
"F" -- which is a spring south and east of the four way junction near Skunk Cabbage Meadow. It's closest to the trail going south to Tahquitz Meadow. This spring is recessed into the ground, so it can be a little hard to find, but it's reliable even in fairly dry conditions and is worth looking for.
"I" may have some water but probably VERY low flow.
"K" may have some water
"L" may have some water
"M" is the spot where the trail crosses the drainage just before reaching LRV. There should be water here. This is the best spot from which to gather water in LRV.
"N" (the meadow) may have some water
"Q" (the spigot at the trail junction) should have water.
Hope that helps.
HJ