We are not hard to find, it is still advisable to consult Google Maps.
Car hire: www.autosmulagua.com
We can make a reservation for a car for you (for example a Fiat Punto á € 20.50 per day including all risk) this can be done in the port of San Sebastian for you on arrival by ferry.
Bus schedules for La Gomera: www.gomera.info/bus.htm
Ferry information:(there is no need for reservations):
Armas (the nicest, sitting outside) (the luggage can be stored for free in a blue or white van next to the ferry stair).
Fred Olsen (more expensive) (luggage can be stored in a special cart next to the ferry).
If you have more questions, feel free to let us know,
Herman and Amala