Remember that you are going to gain 6,100+ feet of elevation hiking from Whitney Portal to the summit of My. Whitney. Depending upon your physical ability, and tolerance to altitude sickness, carrying a lot of weight may be an issue. Another option is to cross the Sierra, starting in the west (such as Giant Forest or Cedar Grove) and exiting over Trail Crest, summiting Mt. Whitney, and exiting at Whitney Portal. This requires a minimum of 7 to 10 days, but is a lot easier on the body than the 6,100+ of elevation gain and loss.
I have seen pictures taken from the summit of Mt. Whitney taken with a 8x10 view camera - and admired the physical ability to tote the beast that far. FYI, I usually carry a Pentax 67 and a Nikon F100 when I go packing in the Sierra, and find that to be a lot of weight.
Also, there is a sporting goods store in Lone Pine that used to sell a patch that states "I ALMOST climbed Mt. Whitney".
Do you have permits set up? If not, you may be disappointed if you do not. See the Inyo National Forest web site for more information.
Please publish a trip report here when you return.
Kris