Which administrative office should I contact?

This is a venue I want to contact in terms of their policy of bringing DSLR's (specifically the Nikon D3100) to music festivals held there, and If I should follow venue rules or music festival rules and I was given a list of people to contact, which of these do I contact? I want to know if it's okay with security & they won't force me to return it to my car, thank you.

CEO
Administrative Assistant
Sales Manager and Entertainment Coordinator
Accounting Manager
Maintenance Manager
Security and Parking Manager
Competitive Exhibits Manager
Derby Club Management
Sponsorships
Public Relations and Marketing Director

Security should probably know about this subject. Since they're the ones checking people as they enter the venue they should be familiar with what items are allowed.

If you don't find them to be helpful you might want to contact public relations or sales.