The only time I've taken a machine on a trip was when I was delivering it to someone else. And it's rare that I don't come home with more machines than I left with.
And I do wake up on days I don't need to get up at 4:30 am, and start thinking about a sewing project and before I know it, I'm up and heading to my machine. BTW - I don't have central air, but I do have a portable window unit (it looks like a dehumidifier and vents out a window) it works great and I just take the vent out and close the window when it's not in use. I'm mid 50's, and having hot flashes so I can't do anything without AC this summer!