The Weekend house is officially on the Early Entry list, so I get having to wait for that until 7 if you don't have Early Entry. But Dead Exposure is (as I understand it) not considered an Early Entry house, so it seems I should be able to get on it if it opens at 6:30.
Honestly, on the whole, I don't think there's that much overlap with the general public between HHN and KSF. While of course there are many who do both, for the most part I feel HHN is seen as the "LA haunt" and KSF is seen as the "OC haunt"