I don't do the day hike thingy any more but when I did...

2 liters to Trailside Meadow.

Have a meal and go to 4 liters...just one stop.

Check water at the seeps on switchbacks on the way down...if I need water add it here.

Stop at Trailside Meadow for sustenance, head dunk and foot soak.

Then back to Whitney Portal for a shower and Chicken Sandwich and Fries.

It's a real simple plan.