I'm not sure why you think the only options are tailgating and sitting on a bench.
As I said, both Disney's wristband system and Uni's holding areas work incredibly well. Guests still have access to a variety of things to do inside the gates, and the park has a simple system for tracking who has paid for the after-hours event and who needs to leave. I have experienced both several times and was never bored,
Also, it doesn't make a ton of sense to force people, who already been checked earlier in the day, to go through security a second time. The lines are already bad for Haunt and it would increase their staffing needs. Moreover, KD has long had a rule against re-entry after the event starts. The same logic that led to that prohibition would have to apply here.
Tailgating would very likely create more problems for the park; produce the opposite effect from what they are trying to achieve; and may not even be feasible, given liquor laws and liability constraints.
As I said, both Disney's wristband system and Uni's holding areas work incredibly well. Guests still have access to a variety of things to do inside the gates, and the park has a simple system for tracking who has paid for the after-hours event and who needs to leave. I have experienced both several times and was never bored,
Also, it doesn't make a ton of sense to force people, who already been checked earlier in the day, to go through security a second time. The lines are already bad for Haunt and it would increase their staffing needs. Moreover, KD has long had a rule against re-entry after the event starts. The same logic that led to that prohibition would have to apply here.
Tailgating would very likely create more problems for the park; produce the opposite effect from what they are trying to achieve; and may not even be feasible, given liquor laws and liability constraints.