G'day Natty,
Quite a lot of people disagree with the work wildlife carers do, as it compromises many important aspects in the balance of nature. Local populations can be displaced, exotic diseases can be transfered, animals lose their fear of humans etc etc. I am of the opinion that if an animals comes into captivity for any amount of time, that it should remain in captivity or be euthanised.
With regards to your little legless friend, it is best if you either release him or contact the EPA tomorrow.
Take care,
Jonno