Havent been to a game in Basel but went to see Spurs play against Bern Young Boys some time back. No, I am not the Spurs fan in the family.
The Spurs away fans were kept "locked" till all the YB fans left the stadium. I had friends sitting in that section but it wasnt too long a wait, 30 minutes max? Transportation is pretty efficient - most of them walked - but there was an increase in how regular the trams were from the stadium to Bern HB.
Just make sure you've got ample time to get the last train home. Bloody Manure fan!