A lot of people take a ferry trip over to Calais to do the ‘booze cruise’.
You pop over on a ferry to Calais, pile up a trolley full of wine and beer, load it into your car, and drive back.

There is nothing wrong with that. I too have often filled my car up with cheap wine on my way back to the UK from being in France.
But I want to persuade you to venture a bit more into France and spend time enjoying the country.
In particular, I recommend Boulogne-Sur-Mer. It is a lovely place to visit and only a half hour drive from the ferry port at Calais (even less from the tunnel). See the tab ‘not just wine’ for tips on what to do in and near Boulogne, plus useful tourist site and accommodation links.
I have to be honest here, and confess to having an agenda for this site. I do have a house for letting, right in the heart of the old town. (Although there are a lot of other very good hotels and places to stay).
If you do become a member, you can get discounts on renting my house. Go to ‘RuedelaProvidence.com’.