I play on 50x hordes. It’s mostly a matter of getting a good base up and running, and not making any noise. But the most important aspects of it is checking your map frequently, and constantly keeping aware of the locations of nearby hordes. The best base in my experience is a Mansion, since it has lots of ammenities… Internal sturdy rooms for crafting/storage, stocked libraries, rare firearms, and rare weapons. In Latest Experimental, it’s also the most likely place to obtain a combat-ready melee weapon like an arming sword, without having to worry about inferior weapons.
Basically, if you take the perk “Scout”, you can detect hordes on your map in the form of a Flashing Z, from up to around 30 map tiles away. These flashing Z’s can be moved to other locations by producing a very loud noise at a location you want all of the Z’s to converge on. Say I want to raid a grocery store for some sweet cereal boxes, but there’s a trio of hordes nearby it. I don’t want to get kerblammed by 100 hulks, so I take anything that can make noise, and set it off about 10 map tiles away from the grocery store, preferably on the opposite side of the town.
My preference is typically for a shotgun, but if you have a talking doll that can be used to a much shorter distance. Just walk 10 tiles away from the town, and shoot your shotgun into the air… Then take a circular path around the town to your starting point, and loot said grocery store with impunity. Talking Dolls can also be used to lure hordes, but only from a single map tile, so using them to kite hordes requires practice and precision.
You can also deliberately trigger a car alarm to lure hordes… Slam metal doors shut, set off landmines, bombs, and such… Basically making noise in a location you want zombies to be in, in order to get zombies AWAY from places you don’t want them to be.