There's no point rocking up to Phillip Island and buying fuel, they are not set up for it, they are a Helicopter Operator and the Landing fee of $20 goes towards maintaining the runway and paying the excessively high rental for the field due to the premium location. As the houses are within 50 metres of the strip they don't want every man and his dog dropping in there on a frequent basis so the fee is set at an amount which assists with this requirement.
Tooradin and Tyabb are 10 minutes away and have better fuel options.