Should be able to set up a release like they have on down riggers and using two rods and reels send the unit out there release the bait and retrieve the unit.1,000m is good range for reaching some areas.
But as you say they could have dropped a few new lanes for future demand,unfortunately no help/assistance can be provided to novice boat owners when they don't know what to launch or where.
Drove into the car park area this morning off Chandlers hill rd this is the "car/trailer" parking area for those who have the larger Hobie style yaks,good luck finding a park.The other parking areas only had about 10 car parks left before being full.Better signage is needed for trailer parking only.
One of the locals at Pt Noarlunga jetty (Gordo)telling me just watch that guy,he'll catch some fish sized or under then take it to his car and come back and resume fishing.And he did a few times,happening all over the place.