Okay,  so I have two cake orders due this weekend on Saturday! My original plan was to bake cakes Thursday, wrap those up, then Friday decorate all day. How early in advance do you guys bake and decorate and finish your cakes? One cake will just be a two-tier buttercream covered cake, the other one will be a two-tier fondant cake with fondant decoration? If I baked on Wednesday and then decorated on Thursday would they still be OK for Saturday? Advice please! Thank you

I bake Thursday, make butter cream Thurs, decorate Friday. Depending on decorations, they're made earlier in the week, if not weeks before (like a bunch of flowers, tiara, etc).  I have baked on Wed, decorated Thurs, and consumed the cake on Saturday and it was fine taste wise. As long as you keep it in a cake box, it will be ok. 

 The cake boxes I have are just the cardboard ones, there will be an open spot. But I’m just worried I don’t want the cake to dry out or anything which it shouldn’t because it will be sealed by the buttercream and fondant  fondant. 

I would probably bake Wednesday and once cooled wrap well in cling wrap.  Then Thursday I would make my buttercream and frost and cover the one cake in fondant.  Then Friday I would finish decorating the fondant cake and completely frost/decorate the buttercream cake.  That way Saturday morning you can do any touch ups that may be necessary.

You can always make a simple syrup and sprinkle that onto the cakes prior to frosting/layering to add a touch of moisture if them drying out is concerning.  But they should be just fine once covered in frosting/fondant.

Thank you for the advice everyone!