User blog comment:AYET/The not-so-sneeky infiltration plot/@comment-2226235-20160520163026/@comment-4754162-20160523073218

But inside hostile territory, one could not just leave the Sunny unguarded albeit hidden.

Looking from the party setup, it seems that ALL of them will go ashore, none will be left to look after the Sunny.

Unlike Dressrosa, Sanji was the reliable who took the guard post.