OUR tarmac is actually concrete and is a littlw worn in places. We laso have a huge mown area to the side of the runway that we use as well and we have a grass runway.
There are plenty of Pitts and far more interesing types that come in and out without any problems. The runway does get swept and is prety much stone free.
It will no doubt feel like your teeth are rattling as you roll over it otherwise feel free to land on the grass.
When are you visiting?