Yes, they will remain moist. If you are thinking about making your cakes a few days in advance, wrap them twice with saran wrap while they are still warm, then wrap them with foil. When you are ready to use them, let them thaw while still wrapped in foil. That way the foil will collect the condensation, and it will not collect on your cakes. I have only had to do this once for a huge wedding cake that took me several days to bake. If it is a cake that you are using to carve, let it remain partially frozen. This prevents the cake from crumbling. Depending on how quickly you work, you may have to place it back into the freezer to “firm up” a bit during the carving process, because they thaw rather quickly.
