yeh man definitely getting a driver with a van. Alot of the good drivers are driving these suzuki APV's (
www.productreview.com.au/listings/suzuki-apv-2005-2018) they are sweet little rides and keep your boards safe. Or these Toyotas
However not alot of them have roof racks so definitely take the soft racks.
If you can't tie knots...tie lots...
Just don't forget to barter I did a few trips from kuta to medewi (about 2.5-3 hours north) one year and most drivers start at about 500K-600K rupiah we got them down to 250K one way.
We found also its better being of indo appearance behind the wheel, if the cops see boards on the roof and whiteys in the car, be prepared to be pulled over.