I'm going to be attempting my first double century in two weeks. I plan to start at 6:00 in the evening. This will be the first part of a 330 mile ride that I will complete in 48 hours. I'm doing it at night to avoid the heat, wind, and traffic... plus it'll be really cool to see the sun set and rise again. I will be alone and unsupported. Any thoughts or advice would be much appreciated.