Should I memorize the buck/boost schematics, or is this something that I should just keep handy as a reference so that when I bump into it I can just call on the corresponding schematic for the correct wireing? And then over time just let it become as routine as running a 3way switch?

I often say, the best thing engineering school taught me was where to look things up.

Clyde:
Memorise where you keep the drawing!

Like I tell my students; don't try to memorise the NEC, just know where to find what you're looking for

John

There must be at least a dozen different ways to connect buck boosts.

I agree with John, just remember where in the truck you keep the diagrams.

Bob

Great! Thanks.