I'm wary of the way you frame your post. Childhood experiences and memories of childhood experiences are not the same.
Veracity of memories of childhood experiences are not central to gaining benefits from techniques to resolve "childhood trauma". Plenty of techniques that are intended resolve childhood trauma's can also be used to gain psychological benefits through resolve trauma from past-life experiences where we have good reasons to belief that there's no veracity in the relevant memories.
Does LW have a curated or tagged set of resources on childhood experiences including "trauma"? Personally I'm interested in perspectives from developing world countries (I belong to one), but I'm totally interested in different people coming at this topic from different angles.
I know Yudkowsky has written about his experience for example, so have a couple of other people, but I'm curious if there's a well-organised list or tag or similar.
Reasons to study this on lesswrong should be obvious but I'll list some of the main ones out: