Yes and No.
Yes, please return the camper reasonably clean on the inside.
No, don’t worry about the outside. Gravel in Iceland is really grainy and cleaning the camper on the outside with a broom can scratch the surface. You are not forbidden from cleaning it on the outside, but please be careful.
There is a penalty fee for returning a camper in an absolute mess. This refers to the inside of the camper. If we need to use stain removals or deep cleaning equipment, we charge a 15.000 ISK penalty fee.