Cambridge, Glastonbury and Celtic Connections have never had any interest for me - but we were supposedly discussing Scottish FOLK Festivals.
We are regulars at Cullerlie which ticks all of the boxes apart from the freebie bit.
We found Girvan interesting and enjoyed the area but had problems with the natives.
Most of the other festivals mentioned have their fans and you pays your money and takes your choice - or not.
We had become regulars at the Fife Sing at Falkland and enjoyed it as well as making local friendships. Unfortunately the change of venue in 2019 meant that we had a bad experience in 2019 and left at teatime on the Saturday. Not the organisers' fault by the way. Hopefully they can do something to address the problems we had.
I/we have visited Scotland many times over the years and invariably found something to enjoy.