They enforce rules when they come to safety. You can’t talk your way into bringing a gun or knife into the parks, you can’t climb a fence and walk under a coaster track without getting removed, you can’t get drunk and climb the Mexico pyramid at EPCOT (I assume that guy was arrested). If they treat capacity limits and masks and spacing as a safety measure it should and will be enforced. If they want to include keeping extra people out of the resorts is another question. There’s no guarantee they will do that, but IMHO they should if there is any chance that a paying guest won’t get to use the amenities.