Thanks for your feedback. I was actually looking that very RPG. I'm looking at some low attendance weeks in my campaign coming up, and I want to keep the group going. Obviously exploring backstories is a great idea, but I'm wanting to do this without taking on too much prep. Re-purposing some DMs Guild seemed a logical way to approach the issue.
I'm also looking at the Duet Columns on RPG.NET which has good advice for approach these situations.
The other thing I'm doing is exploring an alternate monster RPG event, where the characters play the monsters in an encounter the players completed in the past. I can rely on material I've already prepared, just from a different perspective.