In reply to Katka:
"ït is only an island" - I guess it does sound a little stupid (English is not my native language) :-D I meant for instance compared to Southern Spain, Sicily is a rather small area, so I was wondering if the potential - climbing, as well as other points of interest - is big enough for a whole season. We will be travelling by car and will have our dog with us, so mixing it up with other destinations might be too much of a logistics hassle, not sure...
I am also wondering if I would get by with no Italian. Do the locals generally speak English?