Night 14 horde. Changed up the battleplan, removed the front door, added a door a few blocks up, and built a building extension for a stairway. Access requires going through the extension, up the stairs, across a catwalk over a spike pit, through the new door, and down another flight of stairs. Less convenient, but it works.
Just prior to nightfall, had to deal with a random horde consisting mostly of soldiers. While they wrecked the spike moat and even took out part of the wall corner, I did loot a ~150-quality sniper rifle off of one. After fixing the spikes, I removed the catwalk and sealed myself in. When night fell, the zombies charged right into spikes. Most died to the spikes, but I finished a few off with the rifle. All in all, damage took about half the day to fix, including corpse removal. Only one zombie attacked the main entrance, and he died to the spikes on the door.
7 Days to Die. It's strange, I've yet to see any spider zombies in any of these hordes. In my previous playthroughs, I got spider zombies on the 7th-night hordes. Not that it matters, since the whole place is protected against climbers, although I do need to replace some of the blocks with arrow slits to create murderholes.