Jesus, that Wiki page...you can tell it was written by a Yank with a fetish for Scotland.

No though, the Scottish population was not nomadic...obviously. Something like 75% of the country is just wasteland. The population lives in dense areas where agriculture was possible (70% of the population live in the central belt).

I don't think you need to explain the geography of Scotland to arethuza (who is, iirc, a Scot). And the article has a bit of flowery stuff about songs - but overall it's not saying Scottish people were nomadic, just that some people moved seasonally between a couple of locations with their livestock.

Yeah that's pretty much what I meant - shielings appear a lot on Ordnance Survey maps that I use when walking in Scotland (I'm slowly doing the Munros) - often at about 500m to 600m - perfectly pleasant in summer but not where you'd want to live in winter!