Just my thoughts on this, after thinking about it off and on for a while now...
It seems this is less a "Journey" book and more your "Journey experience". Meaning, it is not about the history of Journey or new facts about Journey, or things like this. It is more about your interactions with Journey and their fandom. So, that makes it a bit unique.
In my opinion, I would include a long chapter, or maybe two shorter chapters, that talks about your experience with Journey fandom. Write about how the fanbase reacted to various events, like after TBF, the hiring of Augeri, the releases of the various albums, the firing of Augeri and hiring JSS and his firing and the hiring of Arnel...the band "events" and how fans reacted. Then get into some fandom specific things, like; PerryHeads/Loons vs Journey fans, "Tapegate", the "forum wars", BT refugees showing up here and maybe their hazing, maybe talk about the craziness of Joe and how you had to deal with him, the times you shut down the forum and why. I'm not sure I would get into specific posts because so many of those posts had their roots in insulting or demeaning other people (ie: the treatment of Rich, or posting pics of BT girls and making fun of their looks, etc.) I'm not sure I would have a chapter specifically for Dean because his history could be included in the telling of the history of the forum and your experience with it. I would try to talk to Lulu about it before writing about Dean, maybe have her read it before you add it to the book...just so it is not a surprise and to ensure she is OK with it....maybe do the same for other people, too...just to be safe. These could maybe be two chapters and split between "band events" and "fans gone crazy"

. I suppose there could be a third chapter if you have anything outside of the forum that relates to fans that you could talk about...maybe fan meetups or something, I don't know. I think it should be about YOUR perspective on things because it is unique compared to forum members...don't try to tell our story on the forum, tell us YOUR story about the forums and YOUR thoughts and feelings as the forum owner about what was happening. In other words try not to say things like, "....this caused the fans to feel..." Instead say something like "...as I read how the fans responded, I felt....." That is something we really do not know or completely understand...so it is new.
Anyway, that is my thoughts on things.