My first time was August 1994 with two friends. It was the culmination of a holiday that was supposed to last two weeks but ended up lasting five days as we ran out of cash and other useful consumables.
I seem to remember we arrived late afternoon and went straight to Silbury, we slept under the stars on the grass by the carpark having been entertained by the hospitality of a man with a converted double decker bus. I believe we were celebrating the bus's 40th birthday.
Next day we went to West Kennet and Avebury but didn't see much more as a)we didn't have time and b)my only 'stones book' at the time was Michael Balfour's 'Megalithic Mysteries' which didn't have much more in it (as was a rather stupidly big thing ot be carting around...).