Counsel Anne Stevens QC said her client drank alcohol in the pub and slept in his cab before driving without eating breakfast.
"He had no idea he would be over the limit," she said.
At 7.25 am, almost an hour and a half into his trip to Outram, the driver rounded the sharp bend in State Highway 86.
He told police he was confronted by a car in the wrong lane and swerved left to avoid it. The explanation, Stevens said, was corroborated by CCTV footage from a nearby garage.
Once Wardell hit the first parked car, his steering failed and the wreckage multiplied.
"It was accident upon accident," Stevens said.
Judge David Robinson noted Wardell had another drink-driving conviction from 2009 and ordered a report on whether he would benefit from counselling.
He agreed to the defence suggestion not to stop the defendant from driving while on bail.
Wardell faced repaying an "enormous amount" to his victims and wanted to earn as much as possible before sentencing in September, Stevens said.
