I am going to be making 3 1/2 sheet cakes. My plan is to make them 2 layers high. I was just wondering if I should use supports in them like I would for a stacked cake. If so how do you suggest making it known to the guests eating the cake? Thank you I appreciate all the feedback.

So do you mean you are baking 6 cakes and will end up with three 2-layer cakes all sitting on a table separately? If so, then they are just 2-layer cakes and I dont' dowel 2 layer cakes unless I am stacking a 2-layer cake on top of another 2-layer cake.

Yes that is what I was talking about was a total of 6 cakes made into 3 cakes. Thank you very much I didn't think I would need dowels or straws but I thought I should check to be sure just incase.