I had a Maestro'D who ran a show in an abandoned cineplex. His crew consisted of about 20 NPCs, both cast and stage crew. We assumed the back rooms of the theater had all sorts of tech and repair equipment for the theater itself (wires, cables, speakers, microphones, audio components, projector parts, screens, and stuff for fixing these things when they broke). Since it was a big theater (ten screens) we also assumed general maintenance tools, lifting equipment, ladders, rope, etc. So when I made up show stuff, we could just assume it (mostly) happened as I pictured it. None of the NPCs were "savvyheads" but they were savvy at their job, which was to "keep the show running".
Of course, all this stuff *really* showed its promise when a friendly Savvyhead PC actually did enter the maintenance room.