I found out yesterday my awesome brother is bringing up a 9" Green tea mille crepe cake from Lady M in NYC for M's birthday! They've become a tradition in our family on birthdays.
My initial plan was baking 2 layers of 9x13 with the top layer being cut into a 1 shape.

We have 26 adults, 6 kids & 3 babies. With the addition of the 9" crepe cake do I still need 2 layers of the 9x13 or can I get away with doing just 1 layer of a 9x13 cut into a 1? A cousin is also bring a "smush/mash" cake.