Thanks for your approx. location Blake.
If you're in Campbelltown, which is within their natural range, then I recommend that you keep your Diamond outside in the long term.
I'm still learning myself but from what I've read and learnt from experienced Diamond keepers like our resident guru Serpenttongue, then it's highly recommended for their longterm health.
Just take care to protect them from temperature extremes like cold winds from the south (inc. SW & SE).
I've found that they're sensitive to chilling wind and can get respiratory infections if exposed to them. They can be treated for this successfully if caught early, but prevention is better than cure.
So the enclosure needs alot of thought & a serious windbreak.
Not sure about the bredli though, as I don't keep them.
You're obviously well outside their natural range though so I would think overwintering indoors. Hopefully some bredli keepers can help you with what to do with them?