My mom is another one with 3 heaters going on in the summertime, and yeah, you leave gasping for breath. Thankfully my car has dual heat settings one for the passenger side and one for the driver. So I was driving yesterday with mine set on LO (and the window cracked) and hers on 84 degrees F. Such dichotomy!

Cute picture and they do look jovial, but yeah not where I thought that was going! Particularly when you said road trip! AHaha. But glad you are having fun with it.