I have never made a cupcake cake before. This will be a first for me. I saw one being made on you-tube, and the only thing holding the cupcakes to the cake board was icing used as glue. Is this all I would need? It's safe for transport that way? The customer will be picking it up. It's been hot and humid here.
I have done several cupcake cakes. Putting icing down is the only way I have ever seen the cupcakes held together. The icing underneath and the icing to decorate the cake hold the cupcakes in place. With the heat you will probably want to either freeze the cake before you drop it off or keep it in a cooler for the ride.
The customer will pick it up, so I will just keep it cool and tell them to keep the A/C on in the car. thanks