We just added Camco step carpets prior to our last trip. Attach with spring clips. Even with the outside carpet and welcome mat, the step carpets helped keep more dirt out.
The primary reason we got them was for our dogs. Neither one liked going up the steps and another thread pointed out how dogs can get their nails caught in the step drain holes. For whatever reason, I no longer have to help the dogs enter the camper; they just run up the steps.
2015 Shamrock 231KSS, Oyster shell
2016 Chev Silverado LT Z71 Ext. Cab, 4x4, 5.3L V/8
Reese Straight Line WDH, 2000W Honda Gen.
2 Old Town kayaks & 2 Boston Terriers - Zoey/Gonzo
Lar & Ruth
55 nights camping in 2015, 45 in 2016