Depends on where you live. I live in a desert where the humidity is often <10% and have left PETG and PLA rolls out for several weeks at a time with no issues. With nylons I’ve been a bit more careful, though I’m not sure I need to be.
What kind of climate do you live in?
That’s a great idea. See if you can interact with it at all. Printrun is another option if you don’t want to set up Octoprint.