I am a bit late on this one, but was looking into something else and I came upon Dick Chambers’ write-up of the 1982 Winchester week-end which confirms that was indeed the year when Miss Caroline Herschel was present and “who most charmingly agreed to say a few words to an appreciative audience”. JBAA, vol 93(1), page 31 (1982).
I can understand how it must have made quite an impression on you. Sadly I wasn’t there.
All the best,