I have baked a 3-D duck and a 9x13. How do I stack these two? The cake is being picked up tommorow and will not be used until Sunday. Do I just put supports under to handle the weight and then dowel it to hold it in place?? Thanks so much!

I'd use a cake board cut to size for the duck with supports and a central dowel to keep it in place from shifting or from collapsing. HTH

Yup..I have done the same thing...