Honestly Hardcore mode isn't all that difficult. Even water isn't that much of a problem. If you are really in a tight situation for water there's usually a way to get some. Most of the traveling merchants I've come across sell at least dirty water, if not pure. Those will get you to the nearest well/lake/sink. Food and sleep are hardly issues at all. It takes two in game weeks for you to actually die of sleep deprivation, and there are plenty of restaurant type places to go for food.