I'm looking for a backpack for a one day Whitney hike in August 2016. Not sure how many liters. I'm thinking about either 26l or 34l
Looking for opinions please
Gear list
Food (not sure how much) Gortex jacket First aid kit 3 liter water reservoir. Extra socks Extra shirts Roll of toliet paper Trekking poles (tied on outside) Any other items that I might need are welcome