You can hire a speed boat for a day from fiscardo and have a fabulous time.

They are easy to operate and can even go over to Ithaca. You can get to little coves that no one else knows and have a barbeque, picnic, etc. Whatever you like really. Have a great  time with one of the rental boats, visit all the small beaches marked on the map along the coast, there are two or three small tavernas literally on the beach where you can enjoy lunch, the boats are equipped with cooler boxes and sun tents, so take along cool beverages. The people at the boat hire were very helpful and friendly, the village also has a warm and friendly vibe, really a beautiful part of the island.

Have yourselves a great, fun day out on one of the sight-seeing boats. The beautiful bays and coves around the North of the Island are yours to explore! 

Here are some links:

Fiscardo Yacht Charters Day Trips