I ran Dragon Heist, and it was probably our most successful campaign. Dragon Heist is an excellent adventure with a couple of baffling poor design choices (which can be easily fixed). The split of adventure content into mutually-exclusive 'seasons' makes no sense (a flaw also found in Storm King's Thunder). I simply picked the one I liked best as a 'spine' but included as much as I could from the others. My game had four villains all looking for the treasure simultaneously. Some of them had vault keys (requiring a raid of their lair. Basically, I turned the adventure into a Guy Richie movie, with a final showdown involving Jarlaxle, Mansion, Xanthar, Silverhand and the Cassalanters all in the Vault simultaneously. Each player controlled one of villains as well as their own PC, resulting in a crazy free-for-all. In the end, everyone (well at least those that survived) was forced to flee the vault when Silverhand teleported to the surface and activated one of the Walking Statues to collapse the Vault and keep the gold safe until it could be safely recovered by the authorities.