When coming back from villajiosa, you can stay on the N332 by coming off the slip road for the petrol station sign posted for El Campello. This way you actually drive through El Campello & you don't need to go near the motorway. I always go this way even when driving to Benidorm as I find the motorway very boring & has John said you can stop off at San Juan as well for a coffee or a nice walk.
Regards
Dave