This is going to sound harsh, so grab the tomatoes to throw...
Many of us bemoan the "stuff" we have around us, whether it is quilting related or other - myself included. Our home is full of it! We have things ranging from small to very large (an aluminum canoe that was my father-in-law's) that will never, ever be used. My husband is unable to let anything that came to him through family go. That canoe has not been used in 30 years, yet it hangs in the garage. I've suggested donating it to a local camp, selling it for scrap metal, giving it away... All were met with a firm "no".
My quilts and fabrics will not likely be wanted by family members. We have a very small family and those who wanted them have been given one or more quilts already. They are all also feeling the pressure of "stuff". The antiques that were our grandparents, and our great-grandparents are not anything that our children want, either.
I am completely okay with things that have no useful value being disposed of. The drawings my children, or grandchildren, have done would be an example. Fabrics will be offered to a couple of sewing friends first, then to my guilds/charity groups. Quilts can be donated to whoever or whatever organization would like them. When I am gone, the enjoyment I got from these things will be done. Just because it had meaning to me doesn't mean that it will - or should - have meaning to anyone else.
Those notebooks might be of interest to a museum or historical society. If not, and the family doesn't want them, either, then they need to be recycled - without guilt.