Write the decision before the question
Most surveys go wrong before the first question is written. Someone opens a template, adds twelve questions that sound sensible and nobody ever reads question nine.
Start the other way round. List the three decisions you need to make for next time (same venue? keep the panel? is the late start worth it?). Then write one question per decision. If a question does not feed a decision, it is decoration.
Three to five post-event survey questions is plenty for a guest audience. You are asking a favour from people who came to have a good time, not to fill in a census.






