Personally, I have multiple setups, depending on where I am going/what I am doing.
For School, I usually bring my iPad 3, Y700 (Lenovo), my Anker PowerCore 20100, and my iPhone 5S with an OtterBox Defender case.
When I am going out for a short amount of time, I usually bring my iPhone 5S, iPad Air 2, and a flash drive for my iPad/iPhone, then my Anker PowerCore 20100.
For a longer amount of time, I bring my Anker PowerCore 20100, and 10000, just in case my family members need a battery as well. I then pack my iPad Air 2, iPhone 5S, and my flash drive.