Yes. you can do a support system like that described above. I did one a little easier for this cake, as it was only about 25 to 30 servings (made from 2 1/2 8" squares). My cake board is actually 4 or 5 cardboard cake rounds. Once I had the cake stacked, on the cake board, and completely decorated, I drove dowels into each side, much like you do a center dowel, but it was done on the sides. It made it stable enough for transport. However, my cake was not super slender either, so that helped. I hammered the dowel in until I felt like it hit the bottom cake round. Hope this helps. :)
