That exhaustion isn't something anyone would willingly go through to gain more time. You can skip a single nights sleep before the results are crippling. If that sort of time pressure was necessary then say hello to your all-elf party.
More importantly though Larian want players to spend a lot of time at camp, they've piled pretty much all of the companion interactions into the camp. There's no way to pivot towards trying to limit sleeping more than once every two or three encounters.
BG3 is a story about survival but it's not a game about filling food, water and sleep guages.
