Not been for some years but I can give you a couple of tips
Avoid the rip off boat trips to the famous caves. Instead head for Keri the fishing village of the same name as the inland village. There you will find a boat which does regular trips to the Keri caves which are not full of tourist boats and just as beautiful. And if you are lucky as I was when I was snorkeling, you will come across one of the seals swimming out of the caves
I do not know where you are staying, mist be able to give you more info if you tell us where
Hi we went to Zante last year after 15 years to Corfu it was nice to have a break and visit new places. We stayed in Tsilivi St Johns villas.
Visit Marathonisi you can get a boat and see the Carreta turtles in a small boat you can actually touch them amazing. Also there is a little island there with a tavern on you can walk across a wooden bridge lovely!
Alikanas was a favourite little place a bit like the Cotswolds strangely even saw ducks there.
Went to the shipwreck but drove there superb scenery and quite easy to drive round Zante town is really nice and a lot cheaper for shopping than the small resorts, a lot of history. There is a train tour with guide that is good for an afternoon, the square is really lively at night.
Also just past Zante town there is a road that goes up into the mountains at the top there is a tavern and you can see the whole of Zante although you have to pay for the view had 2 mythos and a coke was 1600 Euro but was worth it could have sat there all day.
Could go on but you will have a fab time I am sure, could go on and on.
Glad we had a change although we are back to Corfu July going to alternate from now on.