Hello we camped here few weeks ago and regretted not getting the pull thru/premium electric site. You get a blacktop pad for your camping unit on the electric/premium pull thru. The other electric sites you have to put your camping unit in the grass and your vehicle goes on the blacktop pad. We loved hiking, biking and beaching at Hueston Woods.
To expand on what Paula said, some of the sites where you park in the grass aren't level (quite a few are very hilly) or have trees that make parking awkward/difficult especially if your site neighbors are already setup.
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