I have a Dakota with a canopy shell, the inside of the be is lined with a bed rug (brand name). The only time I've had any dust to speak of is when I open the canopy door some fall
in if I don't blow it off.
The best dust control on dusty roads is slower speed. Creates less dust in the air and there less dust inside. If you're going to be towing your Scamp
on dirt roads it's even more important to slow down.