How many hours of photography coverage do you actually need?

Our photographer offers packages from 6 hours to 12 hours. The price difference is significant (Rp 8 juta vs Rp 18 juta). For context: - Traditional Javanese ceremony (about 2 hours) - Reception (4 hours) - We want pre-wedding getting ready shots - No separate pre-wedding photoshoot (doing that separately) Is 8 hours enough? Or should I go all-in with 12 hours to not miss anything? What did you regret not capturing?