camping close to Reavis creek will also drop the temps, and the little valley up there doesnt see sunlight until 9 am or so this time of year.
The past few weekends the weather lows have hovered in the 33-35° range, as witnessed in places such as Boulder, E. Boulder, and La Barge canyons. I would expect Reavis to be closer to ~25° I hope that helps, it probably doesnt. Looking at your Avatar you might not have any problems. Tell the girlfriend it will be in the low 40's. Works every time... (for a minute!)
Chumley do you want to be our official HAZ weatherman?
(if so, you can expect a PM from me every Friday nite