My 27 year old grandaughter lives with me and helps me keep the spread sheet on the guns up to date.
One good thing she brought up was that we needed to be sure the "family" guns are highlighted on the sheet so that the family knows what guns stay in the family and what guns are merely trading fodder.
I'm 72 and I have started listing in word histories of each of the guns, where they came from, what I paid for them, etc. so that the family has some idea of each gun's story. Do it now while you still can. I have a couple examples that I have no idea of their individual stories.
Everyone has a box full of photos that they cannot identify. Family guns can possibly have that same problem.