Thats funky.
Although I don't see the point of an organized tour that forbids actual entry to the buildings.
I prefer to go in alone, or with one, maybe two others. Abandoned buildings only of course, I'm no burglar. But derelict properties and abandoned ones, then in I go. Ideally its just me, although I'll work with a partner to serve as assistant, and have their fair share of course, in the loot; if there is way too much to carry.
Although I'm not above a solo run and making several trips, such as if I find the likes of what was in that old place I found the old floppy disk horde and cigarette cards. There, they had an entire undamaged copper boiler, place obviously abandoned for some time, as they had a central water tank that was made of lead, along with a fair bit of the pipework being lead. Some copper, some of it Pb so with it having Pb pipes at all, that was not a modern building at all.
For me, essential equipment for such urban exploration is a bergen, some long coils of rope, a hacksaw, pliers w/ wirecutters a crowbar and a dead-blow hammer. Set of screwdrivers and a sturdy folding knife don't go amiss either. And REALLY handy, is one of those circular pipe-cutters, I've got two actually, one that flips open and then clamps round larger pipes, and one sized for smaller pipes that screws the circular blades of the cutter together until they meet, then just twist and slice straight through, each of them weighing very little, and the smallest of the two only a few grams, and either slices through the copper pipes in a few twists round. Screwdrivers and a Glass cutter.
(an old tungsten carbide cutting tool unusable for its original purpose as it has a chip in the carbide tip, but perfectly servicable as a glass cutter, although meant for use in the lathe [we've quite the machine shop for the contents of a garden shed here, a capstan turret metal lathe, old, pre-WWII but perfectly functional and accurate to fractions of a millimeter, perfectly capable of drilling a hole, tapping a thread, and cutting a matching external thread with a die-head in a piece of steel or other metal, a drill-press, bench-mounted router cutters, a couple of double-wheeled bench grinders, tank-fed gas torche and all manner of other bits and pieces. That isn't my lab, thats just the garden shed, plus my old man has his own hobby-room, for electronics stuff, electrically isolated benchtop, a couple of shelves loaded with oscilloscopes, plus another oscilloscope on a pedestal and stacks of containers of electrical components, stuff for making PCBs etc.)
So we each have our little private hideaways really. (although admittedly now I need far more space than can be hosted in the lab, I now have to store a lot of my equipment in crates in the lounge, three hotplates in the kitchen, another two upstairs (those two need some alterations, voltage input adjustments to allow it to use UK rather than US power supplies) and a fridge in what used to be my mothers bedroom when she was still alive. Now it serves to host the hazat fridge for storing things that I can't afford to have leak, and for storing volatiles with low boiling points.
And then theres the microscope in my bedroom and a microwave I found a while back in a supermarket car-park that had obviously been forgotten [I DID wait, and for quite some time, nobody came for it, and I waited long enough to make sure that nobody was going to either, nobody else either noticed, or if they did, have the brass neck enough to walk over, pick it up and walk off with it on their shoulder :p that now serves as my lab microwave]
