If you have AC power, get a small space heater like this one:
https://m.lowes.com/pd/Vornado-1500-...-_-SosHeating-
_-1000363081:Vornado&CAWELAID=&kpid=1000363081&CAGPS PN=pla&k_clickID=go_625716425_34614972190_11113473 5230_pla-258797184670_m_9060473&gclid=Cj0KCQiA6ozhBRC8ARIsA Ih_VC1hqVb2Q_RdShyfWkOOdyC_8FIyvknNHTWte8jN4kPKDMM ho9wL9XgaAiFXEALw_wcB
Basically, it socks air in the back and blows it out the front. It dries it out quite a bit when heating it.
We also live in Colorado, in our Airstream full time. Our only issue... now it’s often TOO dry... so much so that we need a humidifier.