Hello starting with preparation :

First, the concerned map is Belknap, the 2nd one, you need to make sure u get to level 9 before getting on my strategy as it need u to have the "Exploding Freakers" Injector. U probably already see the point

This injector, is busted, & dangerous at the time, busted cause it allow you to absolutely destroy hordes in just a few bullets without a big score penalty (-15%), compared to "Infinite Ammo" which comes with -40%.
And dangerous cause it can blow you up real fast if u shoot zombies too close, also NEVER try to melee with this Injector...

Once u have it, use another, or 2 more Negatives injector to balance & even upgrade the points you'll get, i suggest "Slow healing" as u should not have any problems with HP, and also "Compulsive reloader" , with these 2 you get to +45% - 15% for the boom freakers = 30% and this is pretty good.

Compulsive reloader get you 25% bonus, but requires you NOT to reload before emptying your magazine or you will lose the remaining ammo, i hope you'll get used to it quickly, I'm myself a compulsive reloader but I managed to take control of my pulsions (DONT PRESS R, DONT PRESS R)

Finally the last part, When you get on Belknap, u will first need to open a few crates to get yourself some weapons, Look for assault rifles, SMG, LMG, high capacity magazines so you can store betweens Side missions ressuplies.

Also, for the preparation sequence, i have an advice, if u are able to keep a few freakers alive, that will get u some time to explore the map further & get good gear faster without bothering every 1:30min
Note that if you go too far or spend too much time, last zombies will despawn & horde timer come back

Once you've done everything above, get to the location I marked on yellow, & here you'll have 2 options : there are two yellow points to mark the locations :


You can get all the way to the back side of the camp at this spot :



This is the easiest/safest way but slower way as zombies have a hard time coming at u.


Or, get on the truck at this start of the camp & if it does the same as for me, the horde will spawn right in front of u, on the hill, & this is cake if u don't let them approach u




By the first time you get on the truck, horde might spawn on the right side of the road rather than on the hill, in my case they only did this one time, hope it'lll be the same for you



This is the fastest XP but you'll have to be a bit more self-cautious.

Now for an absolute warning: YOU MUSN'T MOVE THE BLUE CAR :




For both stratregy, it is necessary that u don't spill too much ammo, manage it, use concentration, usually you'll get to a point where u cant see zombies anymore becauses of the bodies, so use ur survival instinct to see them through, & with the side missions you should have infinite ammo.

As u see one the last screenshots i think putting the bike at the far rear of the camp is a nice idea as if u get overwhelmed u can leave by jumping off the cliff, then cruise around with the bike to to get all zombies in a single pack & u can go back to ur farming point, note that if you want to farm back on the truck at the beginning of the camp this trick will be a one time thing cause u'll never have the time to put the bike up there & come back








I have managed to get to 18M points, in 1h30, which i found pretty slow, i'm sure anyone can do that faster than me, a few run will easily get you to level 35 survivor & give you the achievement "SURVIVOR"

Disclaimer: This is my first guide ever, don't blame me too much if the guide doesn't suit you well enough