Max Yasgur's farm (probably a retirement development now) is few hours drive upstate - not at all related to New York City. Us city rats did very little outside the city limits (pretty large - NYC is actually made up of 5 counties called boroughs).
I know very few New Yorkers who actually went to the Woodchuck festival. I didn't drive until I was 24 (and I was 19 in the summer of 1969). Both of my parents (dad deceased; mom is 83) NEVER drove a car in their lives. My daughter who just turned 21 gave up her license 3 years ago when she started school there - a blessing for pedestrians and drivers in both NY and NJ
Interestingly, commuting to school in downtown NYC meant we slept at home - a big deterrent to doing any kind of drugs. And the drinking age in NYC at the time was 18 - so by time we got to college, who cared? The biggest difference between my college life and that of Darryl's is that the 5 boroughs (really 4 - no one counts Staten Island) IS the campus. There's so much to see and do - without driving - that there's no need to hole up somewhere and get high, though of course many did - and still do.
I also developed a hatered for excessive drinking when some of my equipment was ruined withg beer stains at these wonderful "clubs" I played. My justification for continuing playing these places when I was in college was, heck, I'm getting paid for it - what's THEIR excuse?
It was a big culture shock when my wife and I moved to a fairly rural area of NJ shortly after I got my first job in Trenton. In NYC, if you felt like leaving the house at 1AM to do something, you did. The only places open at 1AM after we moved were one 24 hour supermarket and bars. Luckily, home video came along around that time.