How to make nice parking places with gras and stone sides?

[Elitesquad Modz]

Dear guys from ProMods, I am currently building a Waberer's base on your map and I want to make nice looking parking places.
But that's kind of a problem for me. With bezier patch it doesnt look nice and with add terain also not, what do you advise?
Secondly it has to look like a central reserve, so in mid grass and stones on the side. I hope you understand it because I can't explain it better. I will add some photo's

[Elitesquad Modz]

annother photo

[ETS2-User]

Just check how it's done elsewhere.

[EG0611]

There is a ready parking place in models. Try to check that.

[Elitesquad Modz]

I found out about the parking, but what about the grass?