We decided to rent a car for our final day in Japan, and we used it to access a few parks which we couldn't easily get to get to by public transport. Our target locations turned out to be quite tricky to hit by car too, due to narrow roads and lots of traffic lights, and a recalcitrant satnav made things even tougher by advising us on more than one occasion to exit the expressway, drive down the off-ramp, cross the road, and drive back on to the same road we'd just left.
There were huge numbers of cars in the parking area for Mother Farm, but the majority of guests were apparently there to watch the various shows rather than enjoy the amusements. The ride area was pretty empty, allowing us to ride the Family Coaster (#1693) and the nearby target shooting dark ride in short order. The latter had targets that emitted a bright flash when hit, the first time I've seen something quite like that.