If you are hiking, but not doing one of the east face routes, the Tom Harrison maps are very good - and waterproof.
For climbing route topos, Summitpost.com is a good source:
http://www.summitpost.org/mount-whitney/150227If you want the very latest beta on climbing Whitney, visit Wilson's Eastside Sports in Bishop, Ca. They often have topograph maps of new climbing routes all over the Eastern Sierra, including unpublished topos.
Have fun, be safe.
