Yeah, get your grader out and give it another 300 meters with a turning circle at the end. Its ok to bend it a bit to get it to fit. The surface is the important thing - a bit of gravel on the centre 5 meters does wonders.
And, why not a couple of 100mm reo concrete pads under the props and tires where you park ?
You going to paint the cones black on one side and yellow on the other ?