I'm a fan of Bash3 Boilerplate (https://github.com/kvz/bash3boilerplate) and use a modified version of it for my shell scripts now. I like the code style and the logging, although I've amended the logging slightly to add a pipe input for long running processes that you want to see the output from before it finishes.

I prefer having a stop-on-unexpected script as it makes errors far more explicit and it's not too onerous to work round the peculiarities of return codes.

Greg's wiki (https://mywiki.wooledge.org/) is my go to resource for looking up snippets and learning to avoid the footguns - that and shellcheck are the key to "robust" bash scripts.