I ended up taking about 2.5 quarts from TC to Summit and then I ran out about halfway down switchbacks (I weigh 230lbs). If it was hotter I would have taken more water...I put electrolyte powder right in my bladder but I know some people don't care to do so. This was my first trip and next time I may take 3 quarts because I was conserving a bit. I like Hammer Products or Accelerade compared to Gatorade. I also use "gels" towards end of hike but I have a flask and don't use packets.
