I do remember it was remarked on with surprise that it hadn't been a sell-out (or a lock out as was the case in those days when too many people turned up). I think the club had been expecting a sell/lock out, but as you say people were put off attending for a number of reasons - and those...
Due to some shocking planning on my part I was on holiday and I missed it. No internet in those days (I was in the south of France) and one of the guys I was with (who wasn't even a football fan) rang home and found out the score. Yeah, 0-4, sure. Bloody wind-up merchant.