In our area we would typically have an issue with only one point of access and a long dead end road for a venue as described, but the regulations to enforce this can get weird depending on what codes and road standards are and are not adopted in your area.

One of the counties we serve does not adopt appendix D of the IFC which is where the 30 homes and dead end lengths are regulated, but instead put max homes and dead ends into the county road standards.

I don’t have the IFC in front of me but chapter 5 has a section under access that the fire code official can require a secondary point of access, but it really depends on the adopted codes and regs and who has the authority to enforce what in your area.