Shoot sorry to hear that. I had a scary situation pulling in a crab trap solo (commercial trap on my rec boat) in a current and it wasn't fun. It likely put my boat, life and trap puller in danger. Don't give up on prawning but give up on pulling up traps in scary currents. Follow G-Auto's example weight them down and come back the next day. When you are great at handling the boat approach the buoy from down current very slowly and try to either gain line by picking up buoy and keeping it alongside as you advance on the trap, or if you boat has to swing around only start pulling with the trap puller once you are in reverse, slowly advancing on the trap. Not sure if that makes sense but, if you can get friend who is very experienced to come out with you they should be able to do it.
Navionics has good current predictions (look for the arrows and click on them) but the book the marine stores sell with the monthly cards and current maps (forget the name) will give you better predictions for the areas you are prawning in. I do not prawn in anything over 1kn in the areas I prawn, almost no one prawns exactly where the current predictions are published so there has to be an extrapolation to the where you are pawning if that makes sense.
Be safe out there!
