true, but the evidence from the NT is that it hasnt escaped in the time they have people returning. Maybe it wont work with the higher numbers other states have to deal with, maybe they have been lucky.Problem with this sort of accomodation is that its hard to prevent people from talking or fraternizing. In hotels you have personnel watching the corridors to make sure that people don't leave rooms or talk to each other, around the clock. In this situation you'd have to have to have people outside the cabins 24 hours or alternatively lock people in cabins.
Otherwise guards with guns with stop them doing the wrong thing- a couple of watch towers with spotlights should work Might make recruitment easier too.