In reply to FesteringSore:
Similar sights on the Ochils last week - there was a big gathering of (I think) Hasidic Jews at Stirling University - they were staying in the student residences. On two different days I met groups of them on the Ochils, the first time halfway up the Law, then a couple more groups a few days later. One of the latter groups comprised a man dragging a pushchair behind him up quite steep/rough ground on the Nebit (not sure, but I think the pushchair might even have been attached to some kind of short rope). There was a toddler in it at first but thankfully they were taken out and helped along by some of the other children while the buggy was dragged uphill empty, but it was very slow progress and didn't look much like fun.
Lower down on the main track (quite stony and skiddy) there was a larger group of a dozen or so, including three or four men again each either dragging or pushing pushchairs. They too were all heading uphill with quite serious intent. Curious and interesting to see, given the very distinctive clothing etc. Good to see them getting out anyway, even if the buggy stuff looked a bit precarious. No sign of any such activity when I was up there again this evening, so they've probably all gone home now.
Re the Welsh example, there have been similar gatherings at Aberystwyth Uni, although a couple of years ago all the stuff with candles fell foul of fire regulations and they weren't allowed to stay.