Oh no, I meant I'm not sure if it's realistic to add guitar lake and mount Whitney to the loop I'm hoping to do.

Someone on backpacking light posted some great info a few years back:

BIG SEKI LOOP

154 miles total, adding mount Whitney is probably ridiculous really. I'm hoping to do this in 9-10 days adding Whitney would be 11-12 total so it would take a lot of food. I may just try Whitney as a walk on reservation a couple of days later.

Thanks again for the info.