I used to live in Liguria but the opposite direction from Genova than where you are going (Chiavari). If you change your plans and go that way instead (Portofino, Santa Margherita, Camogli, Sestri Levante, the Cinque Terre, Porto Venere), I can help you. But I also agree that four nights in Alassio is a bit too many for my liking as well.