Meysan Lake Trail Advice

Heading into Meysan Lake area next month for some climbing and fly fishing. 

Wondering how accessible Meysan Creek is between the trailhead and the upper lakes like Camp, Peanut and Grass. Hoping to be able collect water along the way.

the main creek drainage down meysan isn't easily accessible from the trail until your all the way near the top by grass lake.  however there are several small tributaries that flow across the trail and toward the main creek from various gully systems.  some of these are only available early season, but the one around the 10k elevation tends to be reliable all summer.