I am puzzled by the carabiner. First off, please tell me it is a climbing strength biner, and not one of those toy look-a-likes with "Do Not Use for Climbing" stamped on it. If you are going to carry one, it should be climbing strenth, some of which are extremely lightweight, albeit expensive.

If it is climbing grade, I am not sure how you plan to use it, since it is your only piece of climbing gear.

Agonizing about the carabiner is definitely quibbling. Your PSK will get you through a lot of bad stuff, but I would consider omitting the biner unless it serves some major purpose which doesn't seem to me to be very obvious.

I am open to enlightenment.