i am doing an 8 and 6 inch double layer baby shower cake. do i need to separate the two with a cake board and dowels or can i just use the board?should i wait to stack them when i get it there?

Always use a cake board between the tiers and always use a support system under the top cake tier (dowels or bubble tea straws). No matter the type of cake, you don't want the heavy top tier sinking into the bottom tier.

I also use a cake board and dowels for 8 and 6 inch layers, but I also insert (lightly hammer) a skewer - such as you would use for kabobs - through the layers to ensure that they don't shift during delivery. I usually put two through the top layer to the cardboard below in the bottom layer. These thin skewers go right through the cake boards.

thank you so much! now i am doing fondant bubbles in between the 2 layers is it ok for me to transport it like that or should i stack it after i get there and then place the bubbles?

You can travel with it stacked. I travel with 3 tiers stacked as long as the suporrt system is good

you are awesome! thank you soooooooooo
much!