I intended to write this immediately after the road trip, but forgot. My memory was jogged by this thread over on AnandTech Off-Topic. Rather than responding directly in that thread, I decided that I’d write a post here, so that I can easily find it in the future, for both personal reference and recommendations for others.

Here is some randomly-sorted advice, some of which may not be applicable to short drives (and by “short” I mean a couple of days or less):