After a good night sleep some ideas popped up
I think that a modified version of Quiz might do the job. At least as a starting point.
It would allow for long answers, as you suggested, but also give the opportunity for participants to answer closed question in either yes/no (True/False) and perhaps a graded response (I was completely satisfied --> not satisfied at all).
Maybe, if properly tweaked, it could turn into a regular questionaire/feedback form for after session (class) feedback
I can take a look at the quiz code. However, I an NOT a programmer and I might hack it up into a complete mess
Bill