We didn't find out with either, and I felt completely bonded to them throughout the whole pregnancy! I loved imagining my child as a boy and a girl, never knowing whether I was going to have to deal with girl teen drama or rough and tough boy trouble. It was a blast!
The excitement in the delivery room (or OR as in my case) was amazing! Just waiting with baited breathe to hear the words "It's a..." and finally know whether it was a son or a daughter:) When we got pregnant with our second, I considered finding out the gender since we had done the surprise thing already, but my husband begged not to because he enjoyed being able to go out and announce to waiting family and friends what the baby turned out to be:) He said that through the 9 months everyone asked me what was going on and never him, so that was his one moment in the spotlight, LOL. Made sense, so we waited again to find out with our second.
Having to have 2 names ready to go was challenging, especially with our second because we had already used our #1 girls name with our first, but it was still fun to try to come up with another girl name..
for the record, we didn't need it, we got to use our #1 boys name from 3 years when last year we had our baby boy:)
Good luck whatever you decide.. remember their is a surprise no matter when... whether its at5 months or at 9 months or somewhere in between, you find out your baby's gender:) I like the cake idea!!!