Bedroom Carpet

I have a 2010 27FB. My wife is not happy with the white carpet in the bedroom. It won't stay clean. We just made it through a rainy week with guests and it was not possible to keep everyone out of the bedroom, so it got more tracked up than usual.

Is there a recognized practice for replacing the carpet with something easier to keep clean. Failing that, is there a good source for some sort of plastic rug covers.

Thanks
Brad