I must say i find it amusing to hear that people think that these frogs are Brown Tree Frogs, Litoria ewingii. Cogger states a maximum length for this species of 35mm. The largest I have seen was a captive specimen of about 25mm. Unless you have stumbled across an unknown population of giant Brown Tree Frogs which look completly different to any Brown Tree Frog I have seen they are not Brown Tree Frogs.
Unless you have stumbled across an incredibly strange population of colour morph Peron's Tree Frogs, Litoria peronii, they are not perons tree frogs at all either. A distinguishing feature of this species is the mottled colour pattern on their back. Again, unless you have been lucky enough to find a population of perons without the most distinguishing feature of perons they are not perons.
I will not identify any frog from a photo unless it is blatently obvious as to what species it is. Judging by these photographs they are from the genus Litoria. My guess is Litoria rubella, Litoria tyleri or possibly Litoria latopalmata, however the snout looks too short for this species.