So, here is the expandable, zoomable grid image of my base layout. Starting in the center, we have the land claim block in dark brown, set within one of the torch towers (3X3 base, with three torches backlighting the zombies as they enter the base).
Next, in Orange, we see the 1 block deep, three block wide Force Fields, which encircle each of this bases 4 building with a 3 block wide gap.
Each building is 5 blocks high of solid cobblestone foundation, and then built up from there as needed.
In Pink, is the birdcage/archer platform, and here is an in-game look at such from the front:
One of the bases 4 buildings, with a nice view of it's FF ends sticking out on either side, and the building behind me has a part of it's FF right in front of me. Running up to the base of the causeway, in green on the gridview, but painted black in-game, we see this...
The ladder takes up through the iron hatch, and into the archer platform/birdcage. On the gridview, the birdcage is pink, but in game looks like this...
Depending on the progress of a Horde Night, I may take up station by the hatch, and kill off some climbers if there are not to many, and closing the hatch is great to keep others out, while you finish off any zombies that are being stubborn about the whole "Rest in Peace" thing. In the gridview, the hatch is shown in red. For my last several games, the first Horde Night always goes heavy on the dogs, with as many a 5 Direwolves also attending the party. Killing the dogs doesn't require using a bow from up top, but the Direwolves take many an arrow, and killing them from the relative safety of the birdcage takes some time, but is always better then going after them with a melee weapon on day 7.
If/when, the zombies take the top of the ladder, I just jump out of the birdcage, run across the FF to the next base, climb up that ladder, and rinse and repeat. I also like to take the fight to the zombies on the ground, but when they bust out the birds/dogs/direwolves, I climb back into the birdcage.
And here we see the 'Jump' perspective, just before heading off to the next building in the base. I prefer a counter clockwise exit-to-next-building in the base, as I get to cross a FF on the way, and the zombies have to go between the central torch tower and the end of the FF, rather than straight across, which give me a second to climb up that next ladder, and close the hatch, with time to grab a drink, use a bandage, or make a quick repair.
Now...
I have learned that the zombies have a short pathing ability, and if the FF are too long, they just break and do all sorts of random. If the FF are short, meaning the path the zombies have to take is not to long, then they seem to be following the traffic control offered by the FF.
In the provided gridview, there are 4 ways into the inner base, and after a Horde Night or two, I extended the FF, shown in light green, and built the 4 additional torch towers, at all four points of the compass, where the zombies will be entering the inner base.
With the experiment progressing, It does seem like the FF are a good, and viable, investment of playing time, but because of the deeper FF having the annoying problem of digging zombies falling down into them, I am just planning to make the FF just the one block deep.
Does anyone have information that they would like to share, about how long the pathing is that they personally know works? Do the FF need to be three blocks wide?
On the issue of FF being cheese, let us look at my current base. All my FF do is force the zombies to enter the inner base from one of four points, rather than all 360 points of the compass, and as this isn't a huge deal, would most folks think that this was cheese?