Absolutely not. I've baked a sponge up to a month ahead. I did for my sons wedding. Too much going on. Well wrapped in plastic wrap and tin foil, your cake will be fine. Freezing a cake actually makes it moister. I also usually coat my cake with sugar syrup before icing and covering in fondant.
Thanks for the response. I have a lot of cakes to deliver this week so I ll be baking a week ahead. Will post the outcome.