As far as upgrading there arsenal and cars I figured were seeing them as they go along and they haven't come across anything yet. Also I don't think they want to go out there way for convenience. I know going to a gun shop would be a wise survival move but unless they know exactly where one is outside a city I bet they are reluctant to enter a place with potential hordes of zombies like in season 1.
Phonebook + local map = Win
I'd be more inclined to wonder about the zombies that were obviously soldiers....where are their guns? More to the point, any defensive position (i.e. outside the CDC in Atlanta) would have guns and ammo in abundance- there aren't enough corpses to account for the army expending all it's ammo, unless they can't shoot straight.
Maybe nature has a levelling up system?
If I was in that situation I would try to get crops and animal herds going somewhere and build a nice fence or if I could get my hands on a tractor a deep trench around my area.
Zombie Farmville !
You'd think that domesticated cows, sheep, pigs and cattle might be easy pickings for the undead. Also you'd have to take into account the amount of pasture land needed to support the animals. Milk cows would have died pretty soon after no one was around to milk them, and a lot of farm animals would die of starvation once they weren't rotated through new pasture or had silage/feed put out for them
Heck several deep trenches\fences.
Too much like hard work. Probably easier to use the equipment at hand. Where there is farmland there is farm equipment. How much damage would a
combine harvester do? Add a few lengths of chain to the cutting header (the rotating part) and you've got a pretty effective flail.
If they start piling up in the trenches you can always burn em.
Waste of good petroleum products. If you're going that route, then I'd find an ice-cream truck and cruise around playing pied piper for the zombies. Once you've got their attention slowly cruise to a suitable area -and torch them in bulk. Have fun with it- fill up a fire trucks tanks with gas instead of water !
Also id try n make some kinda hasmat suit with armor on the outside, even a layer of Tupperware plastic melted together would repel zombie bites.
Butcheries/meat packing = chainmail aprons, gauntlets
law enforcement offices = unban pacification gear (kevlar vests, face armour, riot shields)
Motorcycle shop = Full face helmets, leather pants/jackets/gloves/boots -double up on the layers and a zombie would need to have shark's teeth to bite you.
Just a case of lateral thinking
28 days later had vehicles, they rode in that bug
What's wrong with the Humvee's that seem to be parked up everywhere?