I would conduct a retrospective and involve: Operations, Logistics, Staff, MM's, Souvie folks, Food crew, Medical staff, Social Media folks, Volunteers, anyone involved in making it happen and ask 3 questions.
1) What should we keep doing?
2) What should we start doing?
3) What should we stop doing?
Items or closely related items which receive the highest number of answers are what will be prioritized.
Main goal is member experience - was it positive?
Fiscal responsibility - were we good stewards?