I hope you will also consider the duodenal switch, which as far as I know, Portland Kaiser does not offer - the sleeve will likely not do much for your PCOS, whereas the DS is a metabolic surgery. Kaiser will probably fight you on it, but you may be able to appeal to external medical review, where you will have a better chance to get an objective review.
You also will have to go out of state for your DS, because to my knowledge, there are no qualified DS surgeons in Oregon (or none I've heard of or would allow to touch me). Although the Kaisers are somewhat independent, NorCal Kaiser is contracted with Dr. Rabkin, one of the best of the best, for cases where they have no choice but to pay for a DS.