Hi Pam,
Deni and I were in Oakland about 2 years ago and they had one reader that could read the small reels. They kept a 64 magnification lens at the desk that you could sign out. There was a very helpful man, Ralph Severson. He volunteered there once a week.
If you find information you want, you can save it to a flash drive. It is time consuming but as long as no one wants the machine, they let you use it.
They have a pretty good collection of books on Portuguese subjects and are also very helpful.
It would be good to call ahead and make an appointment as the staff is very small.
Good hunting,
Tish