You should add HappyHour to your map rotation. The only fault on that map is that the trader is in a fixed location, but it's out in the open. The 3 story Pub is a much better stronghold.
It's kind of fun making a mad dash from the pub to the trader in hopes of being able to get your shiny new guns and body armor and make it back inside before the wave begins.
I'll check it out to see if it passes my HQ KF experience test. That said I have no problem with fixed traders.
And while I'm here I've added Trailofwoods to the server. A mean dark scary number and nice polished map.