Looks like you've got this subject covered without me this time
The chap in the american film seemd to describe it pretty well, including the necessity of the pub for refreshment
DH knows more about this subject than me, but then he has done stage crewing at the Sidmouth Folk Festival in the distant past - it is the premier folk festival in UK to the best of my understanding.
I do remember in '76, when it was the hottest summer ever that at Girl Guide(Scout) camp we made up our own version of morris dancing but instead of using hankies we used wet tea towels - a great way to cool off