Thanks all!
I'd be totally fine piling the blankets on. It's more getting out of bed in the morning that's the hard part :) That's the one plus of the rigs that have the touchpad systems... we could turn on the heat without getting out of bed probably! We do not have that though. We may still go the blanket route and keep the heat on, but at a lower temp than normal. We camped last year in my father in laws secondary rig as we didn't want to drag our old biggun toyhauler up there, and we used the heat then... he would just run a Honda 2000 for a couple hours before bed to get things charged up. Our Montana High Country does have the 4 season package.
We will be camping at around 8,000 elevation in the Green River Lakes area (near Pinedale). They have seen some higher temps like the rest of us, close to 90 during the day, but thankfully that's over with by the time we get there. It is generally not too windy this time of year (for WY standards) where we stay. I've been out there in December for snow machining when it's -10 so this isn't so bad at all :)