Apparently I need to specifically call out the utter ridiculousness? 30,000 rooms at WDW (30,623 according to TouringPlans). 90% occupancy over the course of the past year. Say there's an average of 3 persons per room per night (it's probably closer to 4, in reality), that's just shy of 83,000 guests on site per night. Over an entire year, that's 30.1 million total guests. If you go with 4 guests per room per night, it's up to 40 million. Compare that with annual park attendance. Saying that "most guests stay off property" is preposterous. A lot do, yes, but not "most".