Did fellow lightning-rod gals Kate Gosselin and Sarah Palin become BFFs while camping in Alaska for Palin's TLC show? Not so much!

A Gosselin source tells the new Us Weekly that the reality mom, 35, had "zero chemistry" with the former governor, 46, while taping a buzzed-about episode of Sarah Palin's Alaska for TLC.

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"They didn't speak off camera," the insider adds. "She said the food and accommodations were terrible, and it was the worst trip she'd ever been on."

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Although Gosselin's eight kids loved fishing and looking for firewood with Palin and Palin's children, Gosselin "had a meltdown" in the 53-degree weather and left before sundown, the source reveals. "She just couldn't cope."

VIDEO: See footage from their disastrous camping trip

For much more on Gosselin and Palin's awkward showdown -- how she was "afraid for the kids' lives," Palin's take on her temperamental guest star and Gosselin's jealousy-- pick up the new Us Weekly, out now!

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