It really does depend on where you are travelling/gathering. Extreme heat/cold is only a threshold. For example, without wearing fur armor in 2 degrees, the extreme cold can come up. You'd probably only need one air conditioner, maybe two, to eliminate this debuff. However ’ice cube’ also covers far lower temperatures, for example -60 in murder murder snow, and you'd need a lot of air conditioners to combat that. The same goes for extreme heat. So, check the temperatures where you are planning to go, and then we might be able to answer that more accurately.
You could also look at taming a