I looked at the cache on Google Maps (http://maps.google.com/maps?q=N+35%C2%B0+21.973+W+097%C2%B0+30.128) and it shows a location about 20 feet from the fence. If you rotate the image 180 degrees you can see a bunch of trees/bushes along the fence and if the coordinates are accurate it still shouldn't be that difficult to find.
I don't suppose that there might be a sign at the open sections (coming in from the roads) of that lot which might indicate that access is restricted...
thats the right spot there is no restriction sign I talked to the geocachers who have been there they just can't find it its a camoed bottle and most of the caches I have found seemed easier!