John:
Mr. Keiser did own all the property up to Whiskey Run Road by the time we were laying out Pacific Dunes. However, I only had topo maps for the land as far north as the 13th tee which was one parcel he had bought ... 13, 14 and part of 15 are on a separate block purchased from someone else.
On my first visit to work on the routing, after we'd been at it for 2 days, Mr. Keiser offered to let us use a bit more of the property to the north if we needed it. What are now the 4th and 12th holes were completely covered by gorse, so we had to go around to the road on the north end and hike back in to find what is now the 13th, just laying there much as it is today.
I suppose we could have used more land up there if we'd really needed to, but I didn't really consider it, happy with the rest of the property we did have. We understood there might be another course on the balance of the land someday, and didn't want to leave it with nothing ... but really, north of the 13th green there is perhaps room for another par-3 on the ocean, but nothing more. And, as you know, we already had plenty of par-3's.