Opening Fae Doorways

I asked an older family member about old Scottish legends. She told me about what she heard when she was younger, from someone older still, and I suppose that puts the legend at least a hundred years back.

There are ghostly bagpipes that foretell death...there are banks of primroses, where, if you pick the wrong number, act as a code to open the hillside and reveal the fairy kingdom - if you enter, you rarely return.

She stopped and said she's only heard this from that one person, and doesn't know if it's 'real folklore'. But I figure that if it was passed down through two Scottish women across a century, then it's as authentic as folklore can be.