Not silly at all! I have the exact same questions, and I'm the same level of green!
Carrying 3L from trail camp seems to be the general advice. Steve C also gave me a great trip - supplement it with snow if you need more.
I'm also curious to hear answers for all of your questions!
Also, what tent are you taking? I have been advised not to take stakes (but to use rock anchors instead), as the ground at trail camp is supposedly unstakeable.
I'm going in the first week of August.
