Okay so I'm panicking a little right now! I made one of those "popcorn box" cakes today. The cake is made using 6" round layers. I used 4 cakes that are 2" high to construct it. The problem is, I completely forgot to use dowels and a cake board between the 2nd and third layer! So basically, I have stacked 4 2" layers without any support! I have now put one long dowel through all the cakes but I have no idea if this will do any good. Is there any way to save this cake without ripping it apart?! 
Good. I wouldn't let this cake come to room temp though, I'd serve it slightly still chilled, the firmer the better. Depending on how big it is, I would hold it while transporting so I could shift it around on turns and braking. I know that appals some people, but it's usually what I do, and I'm glad to say I've had 100% success with it.
I've had to hold a couple of cakes before while hubby drove. Sometimes you just have too!!
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