I debated taking the online course from Kaplan, because of my summer job, but I ended up taking the class, just because most of my friends were in it.
If I were to do it again, I would take the online course. The materials you get (i.e. practice exams, practice tests, section tests, etc) are the most important thing you need to study. Classroom just goes over stuff already in the book and forces you listen. But then again I always prefer a text book to a class.
The only advantage I can possibly think of for the class based course, is mock exams. Being with 30 or more other anonymous people can be nerve racking because essentially those people are your competition. This is great prep for the real exam though because when people start talking big, you've experienced it before and phase them out. Also it is difficult to force yourself to write an entire MCAT wtihout distractions.
In your case, if there are no courses offered, I would say you would be more than fine to just take the online course. Just be disciplined when doing the practice MCATS.