I use a camper mat,the one made to go under awnings. I have one about the length of the pod,plus I put a cute little floor mat right outside the door,it to wipe feet again.
If it’s really sandy or muddy I have plastic tub to put shoes in which I can cover to prevent rain soaking them if needed.
I also go to dog shows with my rpod and the dogs go in and out when weather is nice. I set up a little yard the size of the awning mat made from portable dog “ex-pens”.
The dogs track in a lot of sand and much so I do a double layer of yard mats and then I also lay down a bunch of thin,brightly cover Turkish towels on the floor of the camper. These suck up mud and dirt,especially on rainy days. I can shake them out frequently and they wash up like new in the laundry.
I take small hand broom/dust pan and a dust buster.
I do like the idea of a small shop vac. I have one I think I’ll stick in the pod-garage for our next trip Labor Day weekend.