It's reinforcing the current winning option, but I'm changing my vote to Grab and Go. I think I like the decisiveness of it.
[X] Plan Grab and Go
-[x] Go grab your bag: Something's wrong, and you don't want to leave anything behind if you have to do something drastic.
-[x] Write in: "No, I'm taking you with me." Shift, smash the window, rip out the mesh, help Artemis jump on your back, hand her your bag, and fly like the wind. Hopefully in the darkness no one will see exactly what happened. Get as far northeast as you can before putting down somewhere horses can't go, away from people. You can make the trip in hops as often as you're able at night, and walk or hide when you need a rest or you'd risk being seen by people below.