Spike, I have to disagree on the napalm thing. when napalm is made, the thickening agent takes on acidic properties that make it melt through flesh easier, I f a zombie is covered in military grade napalm and lit, they will be incinerated in a matter of seconds, also I would plan to make a Napalm perimeter around my stronhold which would cause a flaming ring of protection and zombie incinerating fire.
so light all the zombies on fire
then burn your own stronghold down with fiery zombies
classic
anyways since I havn't read the Guide (which I really really should) For Fast zombies, well military strongholds aren't that safe due to the large gathering of people in the strongholds, and the imaginable exodus to these areas might attract more of them. Best thing to do, is probably to get out of the city, but go to a sparsely populated area, like a farm
slow zombies i'll do the same and wait till winter,