Also, if I only have my brain stored, can they donate the organs?

Some quick googling of the phrase 'cryonics "organ donation"' suggests the answer is (a) neuro-only is not always possible, so no; (b) trying to do both puts the cryonics part at serious risk of paperwork problems; (c) they aren't experienced enough to do both complicated cryonics procedure and whatever's necessary for donation; and (d) it's probably irrelevant because you'll be so old and dying of nasty things like cancer that most of your donation would be useless.