@Acadianartist: I have to tell you, I have not had a lot of luck with step ins. I first tried to keep our horse out of our fairly large burn area in the middle of his second pasture by using step ins with electrobraid in two parallel runs. The diameter of the circle was about 15 ft. Not only could he reach over and push the step ins over, I think over time the heat/sun got to those and I had a fairly decent white ones that are maybe 3 ft tall. Our neighbors just did a big area of step ins to try to keep some construction trucks out of their eventing area. Within a couple days the electric braid or rope that they use was already dragging on the ground. They also did not cheap out with the quality of the products they used and did not have a big distance between each post. It seems to be a no-go for them for the most part the rope is already laying on the ground after a few days.
It'll be interesting to see if anybody else has a unique way of making your scenario work.
It'll be interesting to see if anybody else has a unique way of making your scenario work.