Back here in the land of A18 Stable, we just did Day 28 (120-minute days). Game stage of 234 for the party (5 players, individual GS 82, 81, 3x 73). Checked the logs and we got 40 demolishers this time. Took a fair chunk out of the defenses, but we're finally upgrading to RConcrete and it's making a huge difference. The amount of mining we're having to do is a bit numbing at present, though at least we get to trade off on whether it's Lead or Nitrate/Coal (and we got one quad mine with all three plus iron at 5 meters below the surface).
What I think may have made a huge difference here is sandbags. It's a bit of cheese, sort of, in that the zeds are forced to jump them, and we have a row of barbed wire immediately behind, so that pops them up a little and immediately slows them. Gave us time to focus.
The demolishers were much less of a problem at this point; calling them out as they came and either sniping their button outside the perimeter, or simply beating them to death with AP ammo, seemed to work pretty well. Not sure if it's a bug, but it seems like killing the Demolisher, even after you've triggered his bomb but before he explodes, kills the explosion. From a gameplay perspective I like it, but it doesn't make a lot of sense from a logic standpoint.
I had to log off for some family stuff immediately after Horde Night wrapped up, and there were still 2-3 people on. I just checked the server map now, and the last person logged out at 03:53 on Day 29. Now I have to decide if the glee of watching what happens to the next person who logs in is worth the damage it'll do to our living quarters. Decisions, decisions...