LOL at 18 I had a much easier time getting alcohol than drugs(not the either was hard to come by) with alcohol I could walk into any store and get my booze. I use to go to a fudruckers around here with a buddy and drink a couple of pitchers on random week nights. At least with drugs I had to track down a friend and go meet them.
Like I said it will be just as readily available as it is now just from different sources.