We enquired about prices with a few different people but every time we were quoted 600,000IR each for a fast boat. We then decided to try and save some money and get the slow boat from Padang Bai to Lombok and then another boat from Lombok to Gili Trewangan.
After doing researching online and gaining quotes for the boat transfers we realised we would be better off getting a fast boat as it was more or less the same price and would only take 2hrs. We managed to negotiate a deal with the owner of Two Thousand Bungalows (located next to Ketut Losmen where we were staying) and bargained his original price of 500,000IR down to 410,000IR.
For journeys where you have to get various boats/cars make sure you ask for a receipt detailing your travel itinerary and your payment.
We were ready to leave at 7am as requested and got a lift on a bike to the boat. The boat itself was only small and carrying cargo back to the mainland. We ended up waiting on the boat for 45minutes because one tourist was late arriving!
We reached our first destination after 1hr on board the boat and were then escorted to a waiting van that drove us for 20 minutes to Padang Bai. From here we boarded a larger and very nice fast boat to Gili Trewangan.