the one and only time i got hit by heat stroke, it started a chain of events that basically ensured my death and the end of the run. due to that, i now give it the full respect it deserves. also, as i've said, i don't play on easy mode. it's far to generous with the items it gives, makes it a joke to survive once you've done a couple runs and understand the basic mechanics of the map.
camel pack doesn't lower your temperature, it merely stabilizes it against the daytime heat. you absolutely must find sources of cooling, which is the logic behind the cold water bottles. however, since those are useless, just hop in water (source or flowing) at night to supercool yourself.
it makes me wonder, is iskandar going to make other methods for obtaining cold water bottles? cause the snowball machine is included in the global nerfing of all the TE3 machines, right?
A few notes on this post.
If you don't like the Easy Path because of all the bonus items, take the Easy Path, keep the Sync Shell and the Energy Cell and throw the rest away. That's what I did. Simple. If you MUST take the Hard Path, expect to die, a lot, all the time, over and over and over and over and over. That's what hard means.
I get heat stroke all the time in the early game. Whether it's from mining some cobble from a vanilla cobble gen before I get a Xfer node set up (or before I knew about them, lol), to working all day out in the sun, to standing by my smeltery while it cooks me up some ores, to just forgetting to refill my camel pack till I am pretty low. Just refilling my camel pack lowers my temp over a very short period of time back to a "normal" temp. And while standing near objects that peg my temp bar (the black one) so far into the max that I can't actually see it anymore (aka, standing near my pyrothium fired crucible or on top of my machines), my temp doesn't actually rise, at all, even a little, while I am wearing a camel pack with water in it (any amount of water). So yeah. Unless you catch of fire, there is absolutely no need for any alternate cooling besides a full camel pack.
You will go thru water WAY faster when you're temp gage is spiking. But yeah, after the first couple of days when water becomes slightly less of an issue, this really isn't a problem. Harvest a couple extra leaves and you're good to go.
As for cold water or water pits stashed around your base, or whatever, again, I just don't think those sorts of things are necessary. If I am exploring a city and actually fighting, I keep a couple cold water bottles on me at all times in case a Blaze lights me on fire. Drinking a couple back to back rapidly decreases your temp (almost caught hypothermia once I think from drinking like 5 in a row lol).
Finally, after you get some the single PCB and the plastic (Beginning of the End quest I think it's called) done, and also have Sapping the Saplings done, you open up a chain of quests that gives you a Glacial Precipitator. You don't actually have to build one.
EDIT: As for the creepers, as far as I know, Special Mobs monsters (which includes regular monsters, because the mod replaces vanilla monsters with Special Mobs vanilla monsters) don't actually despawn the same way standard vanilla mobs do. I've had them despawn for seemingly no reason before, but I've also had them hang around for days and days.