This was exactly my own thought, though the other versions (franc91's corrected one) are fine too.

Cé go bhfuil a fhios agam go bhfuil tú féin a iompar... ann sa Ghaeilge, shíl mé go mbeadh cuma an bhéarlachais ar iompraigí sibh féin (go maith?) mar aistriúchán ar "behave yourselves". I bhFoclóir De Bhaldraithe, áfach, cad é a tchím faoin iontráil "behave yourself!" ach bíodh múineadh ort; iompair thú féin!

Go raibh maith agaibh!!!

Thank you all for your replies. It is quite helpful. The Irish text is for a screenplay (I am a writer in Los Angeles) and a few of the characters at times speak to each other in Irish. For now I went with "Ná bí dána anois" in one place (character speaks to just one person), and "A bhuachaillí, bígí go maith" in another section where she speaks to a handful of men as it seemed the crispest (most brief) of the suggestions. Thank you all so much. I truly appreciate the advice!