Why not launch/recover them on a barge?My understanding of the use of drones for shows is that they can not be over guests, even while in transit to their performing space. So, either WDW wrangled some sort of exemption, or, they're going to build a covered path over the walkway around the lagoon for the drones to fly over, or, it's not for drones.
I think it was @wdwmagic that indicated drones would be from Oddessey and stay over the lake (and giant sinkhole) there. For now.