My sister and I took a Canadian cousin and his wife there in probably 1969. It would have been around June as Charlie tried to go to the D-Day celebrations most years.
I think that candles and a low power generator were used later in the evening.
Memory (which can be a fickle thing...) has it that the Gents was still an external affair. Although there was always the “pick a tree” option.
Charlie’s wife Margaret had not been into the darkest depths of Kent before, so we went to the pub via every little lane that I could find, including one that is now impassable, or was last time I went that way, or tried to!