Well since you're going in the summer and with other people you have a few weight advantages going for you.

You can spread the universal tools around (although carry your own darn lockring tool ) and camping gear can be light light light. Chances are it's gonna rain at least once (you're on the pnw coast afterall) so you gotta pack a bit for that.

What are you doing for camping supplies? I'd say concentrate on losing weight off your gear, and plan with the rest of your group about who's bringing what.

edit: also find some real hills to train on.