Hi - A couple of good reference books to find information like this in is the CRC Handbook of Chemistry and Physics and the Merck Index. According to the CRC, the density of 1-hexanol is 0.8136 g/mL at 20°C (referenced to water at 4°C), and the Merck Index gives it as 0.8153 g/mL at 25°C and 0.8082 g/mL at 35°C. Neither of these references had the vapor density listed, so if I needed to find that, other than approximating it from the ideal gas law, I'd be in trouble! What references did you find the vapor densities in?
Back to the ol' grind, I guess - Happy New Year!
Steve