In the Netherlands, going into the woods after sunset is a big no-no: by default, it's forbidden. But in Germany, there is no such default prohibition against entering the woods at night, and that means there are many more nightcaches there. We surfed around for a few, but in the end we settled for one that J&M had already done before -- the others seemed a bit wonky.
Yesterday they visited us, and after dinner we geared up. All of us had very, very bright LED torches (and spare batteries...) so we were all set. Most nightcaches make use of reflectors. With your torch, you can see these reflectors and navigate accordingly -- so you can indeed only do these caches by night.
When we arrived at the parking lot, we saw another car: another group had just set out as well. We took some time to get ready (and to put some distance between us and them), and we set out. The reflectors were easy to spot, but one near the beginning was missing... So we took to shining with our torches into every side-path to see if we saw the glint of a follow-up reflector further on. We made good way (and we overtook the other group at the first station -- we didn't see them again). The waypoints were pretty nice, but one of the waypoints was missing -- luckily M. remembered the task at that point.
In the end, we completely missed the last station, where we would be given the calculation of the cache coordinate. But by the time we were wondering why we didn't see any reflectors and about to give up, J. said: "I think the cache was somewhere around here..." And lo and behold: the cache was found and logged.
Nightcaching is great fun, but the maintenance of the cache is crucial. If you miss only one reflector, you'll be lost in the woods, so to speak. It's a real pity that some stuff was missing, because it was a really good experience.