I watched the show the other night. I'm not a KG fan, but *clearly* the woman was miserable. I can't excuse all the muttering and complaining, but come on. The conditions for camping were attrocious. I say that and I am a HUGE camping fan, having camped in all kinds of inclement weather.
Some people just aren't, though. She, apparently, is one of them. I can't imagine how much more miserable she would have been if she'd chosen to stick it out and stay overnight.
I don't know why she agreed to do the camping trip. Maybe she needed the money, maybe she thought the weather would be different. Don't know. But I can't fault her for wanting to leave when she did. Sure, the kids were having fun at the time, but they'd only been there for lunch, and hadn't been in the cold and rain for 8 hours straight. Come bedtime, the scene would have been MUCH different, I promise you.