Hi, We are off on our first trip out of the year in 2 weeks (& only our 3rd trip out ever in our 'van) & we have a hardstanding pitch booked. We have not had a hardstanding before & I am now concerned that the hardstanding will ruin our groundsheet. I would like to use some sort of covering as we have a rule 'Shoes off at Awning' due to the kids! What do you use on hardstanding?