A few newbie questions.

a) Consultation lake or Trail camp as overnight stop for first timers? IIUC, Consultation lake is further way but has less wind and fewer marmots.
b) Any advice on how best to leave the tent and pack when leaving for the summit?
c) I sweat a lot (cooler weather up there might help) and need to hydrate to keep up with that. Is 4L (3L pack and a Nalgene) too much to carry?