In epiccraft, I ended up settling on the border between a jungle and arctic. So, between being batted around by yeti's and bit by poisonous spiders, it was a madhouse. But, I ended up getting frostbite more than heatstroke. I ended up finding the hard way that if you have bad frostbite, not a good idea to jump into lava to warm up.Yeah, I've only dealt with hypothermia once, it wasn't fun..... spent much of the night fishing in gold boots while standing in a pool....... Noticed the status effect, but couldn't get to the pyrotherm. I did manage to survive the night but I swear it was an hour of playing time before the frostbite wore off. Spent a heck of a long time cuddled up with the pyrotherm suffering from both heat stroke and frost bite.... FML
But, setting up a 1x1 pool of lava with a cover over it that you can walk on. Yeah, that worked like a charm. They had campfires too. don't rem which mod the campfires were from.