You are mixing up your pipe tune composers.

Lochanside is by G.S. McLennan, who was from Edinburgh.

John McLellan (composer of the multi-titled tune that became The Road to the Isles) was from Dunoon.

Isn't there another set of words? I heard Jim Malcolm sing something to that tune a few years ago and I remember his version explicitly using the phrase "lochan side". (I didn't like it very much).