Hotel room, but now when I've thought about it rationally, I'm not sure if I can do it there, because the mood for actually being able to do the deed cannot be predicted and once it comes, it probably won't last long enough that I can make it to a hotel. So it has to be at home, I live alone though, but still would hate to do it here because bigger chance that the police will go through my stuff once I've died, but then again, I've witnessed instance where they won't.
But anyway, I've observed my moods and gathered that it's best to have everything ready and set, wills and notes written and so on, all ready to go with a push of a button and once I hit the mood again, just do it. Though if N is the method, getting it from the bottles and getting rid off them would slow down you a bit. But it's still better than actually setting a date, getting a hotel room and then traveling to it.