It depends what you're after with regards to Flissy. Do you want to put her in a creche for a few hours, or keep her all to yourself? You'll find some resorts that have a creche for babies, but you'll have to pay extra for them.
Italy is fantastic for getting out and about. We went to Amalfi for our honeymoon 4 yrs ago and it was amazing! There was the beach and the pool, but also Pompeii, Vesuvius, Capri, Positano, Herculaneum etc. Plus May would be a nice time as it will be warm but not scorching for Flissy
