Where you place photos in your memoir layout is important.
While it may seem obvious, it bears repeating that where you place photos in your memoir layout is important.
It will influence how readers appreciate your story. The only way I can grasp that makes sense is to place photos chronologically within the text. Why?
A bit of book-writing talk
There is in reading and writing a phenomenon called “suspension of disbelief.” If I as the reader am constantly saying “This is only a book. This isn’t really happening as I read,” then it is impossible for that reader to get “lost in the story.”
On the other hand, if the reader agrees not to challenge the story—to make as if the story is actually happening as s/he is reading—then there is a good chance the reader will enter the story and experience it as if it were unfolding before his/her eyes.
Now the reader is only one partner of the agreement. The other partner is the writer. The writer MUST NOT do anything that forces the reader to suspend disbelief.