Corsica - Bastia - Livorno ferry

[Mart75]

Hi
Heading down to Corsica - (spending five days or so on Corsica) in June - does anyone know whether I need to book the ferry from Bastia to Livorno well ahead or is there enough availability that I can decide when I'm on Corsica?

Also (whilst I'm here) - any recommendations for campsites - preferably not resort-type sites

Thanks

 

[er-minio]

June is not exactly high season, but I'd book in advance.