This is what I ended up doing.
I got to the place a little before 1 and was shocked to find everything still there. As such, I decided to just sit around and practice until someone showed up. Well, an hour later (and an hour before their gig) no one has shown up. I then remembered I actually knew the houses WiFi password so I got online for that update and right after I sent it I heard someone on a phone outside the door saying what sounded like, "Who has a key to the door?" I figured that it was one of the guys in the band, but since I didn`t want to be confrontational if he started asking questions about my rig I kept quiet and started quietly packing up my head (an idea I got from the above quote).
Anyways, I waited around a little bit until it sounded like the voice was leaving the floor our space is on and very quietly I stepped out of the room, locked the door again, and snucked out the back with my head, power cable, and speakon cable. My only wish is that I had thought of that sooner.