Conca is fine, but you will be forced to drive everywhere (which can be an expensive proposition) or take the bus.
Had a place on the beach last June in Conca dei Marini ... was magic! ... if you are renting a car be certain your apartment provides parking ... most times we used a water taxi or bus ... you will be close to Amalfi which is a kind of transportation hub to anywhere on the coast ... enjoy!
Hello! How easy are the water taxi and buses to access? How much do they cost?
... there is a water taxi at the beach/fishing village of Conca dei Marini ... think it was about €5 RT to Amalfi Centro ... it's an on demand service run by Gianfranco Gambardella ... Enjoy!
... in addition to the on-demand water taxi service at Conca, the restuarants there (la Tonnarella, Risorgimento) offer complimentary water transport to and from other villages ... of course you will need to be a client but keep that in mind ... as well other beach restuarants along the Coast offer such service ... I have frequently used the service offered by da Teresa at Spiaggi Santa Croce to and from Amalfi ... Enjoy!
Don't rely on the SITA bus. I was on it yesterday from Positano to Amalfi and after the pickup at Positano Sponda it was full - packed - I was standing the whole way - and it didn't stop anywhere until Amalfi.