I can only tell you what we do with our male Standard Poodle w/ SA.
We started out doing what you are doing....traditional oil bath, put in crate for an hour, wash/rinse etc. etc. until I was told about a Poodle person that had been working on a special goat milk soap and special oil treatment that she had good results with. We have now been using it for about 2 years and while it doesn't make the SA go away completely it definitely has helped and the process is comparatively easy. Basically, the process is to wash the dog with the soap, followed by a vinegar rinse and then dry the dog. After that, you spray the dog with this oil product, rub it in a little. I then, take our dog out for "Frisbee" time for a short while and when brought back in he is dry.
If you are interested contact....Sheree Stone at 1-832-212-1306 or firstname.lastname@example.org
(she is in Texas I think)
Hope this helps,