I recently spent a few weeks in Germany, and yes, I did bring a metal detector with me. I opted to bring the XP Deus, because it’s a very lightweight machine, and collapses down to about 24”. Traveling in the US with a detector isn’t a problem—you just throw your gear in the car and go, but traveling overseas can present a challenge.
Years back, I went to Europe frequently, and learned early on to pack less than I thought I would need. I knew that upon arrival I would have to make use of public transportation, taking a cab to the train, a train to my destination, and might even have to walk from there. I didn’t want to be encumbered by a bunch of luggage in addition to detecting gear.