Help, I have lost my video camera

My wife, 3 children and myself have just spent 3 1/2 months travelling on the east coast. On our way home we stopped at the dingo fence cattle grid about 100km east of Nullarbor on Wednesday 13 January around 4pm in the afternoon. We were taking some video footage and got distracted doing something else and put the camera on the tow bar of the caravan. We forgot about it and drove off. We stopped about 90 kms later to do some more videoing and realised what had happened. I unhitched the caravan at the Nullarbor Roadhouse and went back to look for it, but there was no evidence of it. There was no debris on the road to suggest it had been run over and I searched the area on the verge where I thought it could be. We are hoping someone spotted it and picked it up. I have made a report with Ceduna and Eucla Police stations and contacted Yalata Community. I don't care about the camera but the footage on it is priceless. If you know someone who has crossed the Nullarbor in the last few days can you please, please aks them they found it. If you can help, please email me at aclane@live.com.au.