Kangaroo Island - Itinerary & tips

We spent 4 days at Kangaroo Island. Below is our schedule:
May 9th: Took 9am ferry to Kangaroo Island and arrived there at 9:45am. Drove to Seal Bay directly and got there at 11am. Spent about 2 hours at Seal Bay. Then went to Kelly Hill Caves.
May 10th: Drove to Cape Borda Lighthouse in the morning. After that, went to Flinders Chase National Park and spent the rest day there.
May 11th: Drove from Flinders Chase National Park to Kingscote. Then wandered around the town. Saw Pelican feeding at 5pm and joined the little Penguin tour at 7:30pm.
May 12th: Drove from Kingscote to Emu Bay, American River and Penneshaw. Took 2:30pm ferry from Penneshaw to Cape Jervis. Drove back home.

Tips:
1. Kangaroo Island is much bigger than you thought. You should spend at least 3 days to go through most famous sightseeings like Seal Bay and Flinders Chase National Park.
2. Book your accommodations early. Especially during the school holiday period. Don't stay at the same hotel if you spend at least 3 days at the island, otherwise it will cost you a lot of petrol and time. We stayed at Flinders Chase National Park area for 2 nights, Kingscote for 1 night.
3. The road situation at Kangaroo Island is pretty good. Most of time, you will drive on the 11okm/h zone. Slow down when you pass through any town.
4. Avoid to drive at night. During night time, there are plenty animals like kangaroo, koala etc. crossing the road. And on the country road with 110km/h zone, normally it doesn't have enough lights, which means really dark. So arrange your trip carefully and back to hotel before it gets dark.
5. Bring your GPS with you. Most of time, when you drove on the country road, your normal mobile phone doesn't have any signal. That's another reason you shouldn't drive at night. Because if you lost, it's hard to find any house or any people to get direction.
6. Fill you petrol regularly. Please remember most of country petrol stations will close before 6pm. And Kangaroo Island doesn't have a lot of service stations. Before you start your trip, always find out where you could get petrol in advance.