That seems like an inefficient way to go about it, and inviting disaster. One knock could smear or crush it, if it doesn’t fall victim to turbulence or get dropped. Also after all that the freshness might be questionable.

Why not have a caterer or bakery in the same state deliver it?? Or at least them buying something there. They should choose and organise their own wedding cake so they know they like it.

This sounds like a very silly request