hi, i was in corfu sidari last year twice. firstly we booked our trips with the travel shops in the town rather than the reps as they are much cheaper.
we did a boat trip to corfu town. a trip to kassioppi, and a trip up to the mountain the views were spectacular, we also walked to sunset beach to watch the sunset obviously, there is a restaraunt there and we had a bite to eat and then booked a taxi back to sidari.
hope this is of some help xx