A note of caution about interview recordings. I too have been recording people's stories for about 35 years, but only about a quarter of them have appeared in print to date. I have recently offered the entire collection to the two most obvious archives in the UK. One was not interested because there were not enough "well known" names in the collection, and the other, having promised to arrange to take them from me, has not been heard from since.
This lack of interest - without having listened to any of the content - is most disappointing as it means many great stories will never reach a wider public. I highlight this to you merely to bring attention to the fact that, in my view, getting someone's stories down on the printed page is essential.