The other detail we need to remember is the size of photographs. The photos I have from the 1930's are tiny approx 2" x 3" and only having a couple can make them difficult to scrap without them getting lost on a page.
The wartime photos I have of my Granddad, Uncle and Dad were all made into postcards which in some ways has helped preserve them as they are on a thicker paper.
For me the most important thing about heritage (and baby) layouts is that the photographs are the main focus and that decorations and embellishments are kept to a minimum.