Get around Koh Phangan
100-125cc motorbikes can be hired from around 200 baht/day; larger capacity models cost 300-700 baht/day. Foreigners may be required to leave their passport as a deposit.
Some rental shops overcharge for every scratch or dent. They don't fix, but rather replace the whole part - so note damages to the bike on the rental contract. Be aware that your passport may be held against you until you pay the exorbitant repair cost.
Avoid riding at sundown, when the bugs are out en masse, and result in brief periods of riding blind, while you desperately try to clear your corneas. Try not to go home with a 'KPN tattoo' - this can either result from your tender-skinned body sliding along a bitumen road at high speed with few clothes on, or from the inside of your leg touching too hot exhaust pipe of the moped.
Care is needed if attempting to go over the notorious Haad Rin hills, the roads at the eastern side of the island, and north of Haad Yao. Especially the "Hill of Tears" (first steep ascend from Thong Sala towards Haad Rin) needs caution - use low gear only and rather have your passenger walk, than bruised up.
Drunk driving in the West is illegal - in Ko Pha Ngan it's suicidal. Better to sit in the back of a taxi than hitting one head on at night, or end up in hospital.
Wear a helmet, avoid riding in flip-flops and stay within your limits. The slower you drive, the less it's gonna hurt.
It is also possible to rent small Suzuki jeeps, however you will find that you can circuit the island in a day.
Songthaew pick-up truck taxis criss-cross the island for around 100 baht a ride, or 150 baht for the less accessible destination of Thong Nai Pan, if you share taxi car with other people.
It is important to note that ALL taxi service on Koh Phangan is provided by songthaew. Should you choose to go with a freelancer on a motorbike or in a pickup, make arrangements quickly, quietly and pay surrepitiously.
Boats cruise the bays with your snorkeling gear until somewhere takes your fancy. The round-the-island, all day boat trip is a great way to see some of the best beaches in the island.