What's a good place to make a base?
Farmhouses are good, cabins are also good, and LMOE shelters are practically ideal. I've noticed garages make pretty good bases too, though since they are in the city you'll have to clear a big chunk of the city to make it safe.
Also, where can I get the following?
- clean water (am I just going to have to scavenge for water purifying methods/bottled water forever?)
- Nails. I noticed some nails next to some debris. Can I destroy stuff for nails now?
You can turn 2 or 3 hotplates into a water purifier if you have the skill. You'll need a couple other parts, but the heating elements are the main things you want from hotplates. And using that it's very easy to just fill a jerrycan with water and use the purifier on that to get 40 units of clean water.
And yes, you can destroy structures for nails now. A molitov cocktail on a building will make it implode into a fireball, then just give some time for the fire to go out and you got tons of nails. Also in the construction menu you can deconstruct most furniture with a hammer and screwdriver those give nails too.
How do I repair/modify cars?
'e'xamine the car and it will give you a GUI for all things car maintenance related. You'll need a welder loaded with batteries and wrench for most things though, and a hacksaw if you plan on removing parts. You also need mechanics skill. Different amounts for what yer planning on fixing. Fixing most basic stuff requires 3 maintenance, more complicated stuff needs more. If the part is completely trashed you only need one skill, but you need a replacement part.
Do dirt mounds in farms randomly spawn food items throughout the game?
Nope. Newly discovered farms always seem to have fresh food in their fields though.
How do you craft bullets?
You need gunpowder a couple dozen casings, some lead, and a primer for the size of the bullet yer making. I think you'll also need a hand press and die set. A kinetic bullet puller lets you disassemble unneeded bullets to get gunpowder and lead for bullets you need. Primers and casings are harder to come by.
Do you need to assault a military base to get in? Or is there some sort of trick you can use? (EMP maybe?)
To get into a bunker the easiest way is to assult a military base at night and get some military IDs. You can also electrohack the door (with skill) or just blast the bunker open with explosives or a big car. Careful though, there's hostile turrets inside unless you use an ID, so if yer breaking in, prepare for a fight.
What do you do when there is a zombie horde in every city, guarding all the good stuff?
Not sure yet. I looted a gun store and went rambo on the place and that seemed to work. It would be pretty hard without a good gun and mountains of ammo though.
Is there a wiki I'm missing for the new version?
Not yet that I know of.