How Long Can You Freeze An Undecorated Cake?
Decorating By Juds2323 Updated 21 Mar 2007 , 10:39am by Chiara
i did a fresh test on 2 cakes both frozzen at the same time did one 6 month it was great still moist and fresh and the other 8 months it was still as good as frehly baked i did wrap in platic wrap about four layers then one layer of foil over that then one layer of frezer paper that i wrote all my info on. a lot of wraping but it was well worth it
as far as carving a few hours or more
I talked to a friend about this same thing the other day. She works at a local grocery store bakery. She said that the cakes they get come in frozen ( how long? who knows) and they stay in their freezers for months. So I think that could last a long time if packed good. I think blessBeckybaking has the right idea. 
As long as they are well wrapped you can keep them in the freezer for up to one year.
Now having said that some plastic pkg places that shrink wrap state that the contents are good for 2 yrs. I don't have a vaccume sealer.
I usually place several layers on plastic then a double of cheap foil or one layer of the heavy duty foil. You will know the difference of the foil if you have ever used the extra heavy.
Good luck
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