It will cost you about 3 times more and I wouldn't do it any other way. I wouldn't bother importing if I was gonna pickup a shitbox, so the car is worth the care of a container.
I would still remove everything you can, as there is a chance things go missing even at customs. No matter how small the item like gearknobs, car mats and even the car jack...write everything down on the shipping list.
RORO is cheaper for obvious reasons and many feel it's fine afterall the money you save will help cover a respray if your unlucky! You could also take out insurance but I doubt many of you do....for those unseen accidents such as a torn/damaged front bar & sideskirts when they race off the ramp, scratches on doors and panels, undercarriage damage etc. Question is for minor but annoying damages like scratches and dents, it's your word against them and you'll probably end up having to fork out the money yourself.
But I would say it all depends on the value and condition of the car. If it was in a fair poor condition and nothing could possibly be worth stealing, and it needs a new respray anyway then go RORO.
Else for peace of mind, container...and you can fill it up with all your goodies!