Thanks for the reply, appreciate it.

Both of your answers sound workable for me!

Even if I couldn't restore the whole profile from backup while traveling (which seems natural), at least it's still possible to restore some data. Which should be enough in the short term.

And that's perfect that I could manage it from a different Mac. That totally works for me. I worried there would be something which prevented that. I'm imagining a parent using this for parental controls, but then the kid disabling it at a friend's house who has a Mac. Works better for my scenario though!

When you set up the phone as Supervised, there's a box you can un-check to disable using a different Mac. So just make sure you don't un-check it :)