We have found good deals and quality with www.doyouspain.com who are agents for the car rental companies inside Murcia San Javier airport.
How to get there by car
Spanish Highway. AP7 Alicante - Cartagena
Exit 786 - Los Narejos Developments. Los Alcázares (North)
In the direction of Los Alcázares. Turning for Roda.
For those of you not wishing to rent a car then bikes can be hired locally, please ask for more details.