Hobbes, I am amazed that you are planning on carrying 6 L of water! Why not a stove and fuel -- they only weigh about as much as 1-2L, and you can melt all the snow you need?
When you are at Trail Camp, could you try to dig down to the inlet to the TC pond. There should be running water there, and it is a really shallow stream. I'd like to know if that is a viable water source this time of year.
