Question: Any suggestions on a good outdoor carpet for our RV?
Answer: Do an internet search for outdoor RV mats and you will get many results. You can check sources such as Camping World.
You will have to decide which of the many brands is good for you. A couple considerations to think about:
You may want a mat that lets the grass breath, so that when you pick the mat up, the grass is still alive for the next camper.
If you are camping on a dirt surface, you might want a thicker mat to minimize the imact of rocks or pebbles underfoot.
Also think about how it will fit in your storage compartment. Keep the size manageable for easy fold up and storage. If you think there will be times when you want to cover a large area, you might be better off buying two smaller mats that can be used together, or on their own.
Also consider if you will be in a single location for a long time and the type of weather you will have while there. In the past, when we were in a location for over 6 months (and part of the time in winter weather), we just bought some basic indoor outdoor carpet and threw it out when we left the campground. AstroTurf is another option.