Thanks for the poll responses. We had decided to go Saturday (yesterday) with the elf pajamas because Jen wanted to be there for the photos. But yesterday morning the formal clothes arrived in the mail so we had CHOICES.
We dressed them in the formal duds and brought the PJs if we were allowed to make a change (it's Target, it's like a cattle call rush). We were able to change and got the best of both worlds. The elf pics actually came out better (kids were more relaxed, less posed) but we got at least one good combo shot with each outfit and I actually ordered two different sets of photo cards, one elf and one formal. :)
Yay!