I think I’ve got the ride to work sorted out, apart from a couple of little hiccups we won’t mention like the Xtracycle’s rear gear cable snapping on the one place where I have to ride uphill in traffic*.
I’d originally planned to use the tram for most of the route between our village and the farm, with a bike at both ends to cover the first and last bit, but apart from the security issue, Stuttgart’s tram system mostly goes from the edge to the centre, whereas I wanted to go from one suburb to another, and those trams ran only occasionally, usually before or after I wanted to travel, and often thirty seconds before I got to the station.
After an embarrassingly long time riding into Stuttgart and back out again, it finally occurred to me that I was travelling off-peak in both directions, so I could carry my Xtracycle on the tram for free (British public transport providers take note: this is possible without the sky falling). Now I cycle to the local tram stop, ride the tram to the highest part of the route, which rather conveniently is the last station before it goes down into Stuttgart, and ride the rest of the way. Coming back I catch any Stuttgart-bound tram on the other line, hop off again near the top of the hill, and pootle back through the forest. No bikes are left to the predations of local vandals, and I get to ride the Xtracycle. Everyone wins.
Until it snows, but let’s not worry about that yet.
*It turns out that with some pliers and a lot of swearing I can -just- get a normal, standard-length back gear cable to fit on an Xtracycle. I’m probably the last Xtracycle user to find this out, but I put it out there anyway.