I posted a pic from mid April from 9030 looking into Echo Valley:
http://yosemitenews.info/forum/read.php?17,87813,88518#msg-88518Not to dissuade you (I thought you were doing Pohono

though)
Lost Valley had no snow really (it's burned) (so... it melts quicker)
Echo Valley holds snow longer... It's better if it has more snow actually...
we have gone thru later in year (like mid June big snow year) and
it's a whole lotta fun... since you stuck to trail and all...
No question gettin to Bunnell non issue... but after that sorry I don't know
how much snow Bunnell Avalanche will be still holding...
and beyond there ...
Yeah, sorry not much help ...
So how about a picture
from mid april:

And bunnell from above:

So anyway, in conclusion... go for it...

A lot of it will be dry ... I'd just expect yummies after Bunnell...
Maybe you can get more info from wilderness office... though I really don't know
I never go back and report... and I see they are issuing permits for Rockslides
So you never know
Have fun
I'm off to the mountains... I miss them
