Fortunately, my father DID do this. In his retirement he wrote about his war in night fighters with Serrate and AI, happily it was then published in 1997. (details on request)
The family learnt things about him and the war we had never known and also about his parents. We did known them as they got the chop by a V2, since my paternal grandfather was RFC on SE5a, it would have been grand to have known him.
So - get talking or writing. If you don't know how to distribute it - then your children or grandchildren will!!