Those things aren't concentration camps, from what little I've seen online they're basically just regular camping grounds fenced in with a bunch of huts in hotel room quality and furnishing, not prison cells.
For example one testimonial would
https://www.scmp.com/economy/global...s-what-life-inside-australian-quarantine-camp
If they escape mandatory quarantine they will be hunted down and put back in, that is kind of the definition of a mandatory quarantine, you can't just skip it if you don't feel like it.