As for remote islands, beware of uninhabitated ones.
They can be nice and dangerous at the same time.
I once set foot on one and only later when we were about to leave did we recognize that sign warning of quick sand. Vegetation has partially covered the sign.
How about just playing regular beachvolly with clothes on? Any hidden courts in Kowloon area?, or do I have to take it to ether repulse bay or golden coast to be able to burn my pale scandinavian skin?
Generally anything advertised as "nude" eg nude beach volleyball, nude bathing, nude beaches, nude <insert item here>, seems to be 99.9% populated by people who I'd rather their physiques were covered than not when I met them!