I'm making the Detroit Tiger's stadium for my son's birthday. If anyone has any tips for me, eg., best cake for carving, easiest way to carve it out, how to stack and the best icing (buttercream/fondant). I appreciate any advice. Thank you.

Here is one I made, not my best but give you some ideas maybe, to do or not lol
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1402405