Gettysburg Campground has several cabins accommodating various sized groups. West of town on PA116.
There are three campgrounds immediately south and west of the National Park. The KOA has cabins. Little Round Top campground does not but it is on a battlefield site so it is significant. Gettysburg campground does not have cabins to my knowledge but it is closest to the National Park. I did not see any "homes" on the park grounds but there are private homes on the perimeter of the Park that may be for rent privately.
Gettysburg koa has cabins and there place I know I hard it on news 8 on battle Feld
I'm not sure about renting homes, but they do have a huge camping area which is really nice
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