I did a similar trip in April 2009. I hiked to Iceberg Lake on day one. I climbed Whitney, Muir, and Russell (in that order) on day two. I hiked out on day three.
My advice:
Ascend Whitney via the blue line on your second map. Go from Whitney to Russell via the pink line on your second map. Descend to UBSL by following the line on your first map. You could also descend by following Russell's East Ridge to the Russell-Carillon Saddle before dropping down the slopes north of the outlet of UBSL. I don't think any of the lines on your maps are exactly on the easiest routes, but they aren't far off.
I don't know anything about the chutes on your third map. Good luck, have fun, and don't get your name on the evening news.
