SARAH PALIN & KATE GOSSELIN's SUCKY WILDERNESS ADVENTURE

SARAH PALIN bit her lip as KATE GOSSELIN melted down on their camping trip after the Plus 8 mom was handed a bucket with a toilet seat on top.

Kate Gosselin's much-hyped Alaskan camping trip with Sarah Palin turned into a nightmare when the mega-mom suffered a diva-like meltdown - and stormed off despite Sarah's pleas.

The reality show star stayed at the campsite for just two hours of the planned two-day adventure - and left amid an avalanche of insults, complaints and tears, The ENQUIRER learned exclusively.

"It was a nightmare," revealed an insider.

Kate agreed to visit Alaska for her TLC show Kate Plus 8 - but it was clear from the time she hit the ground that she would not be a happy camper.

And then Kate Gosselin learned exactly what the word "wilderness' meant!

For the full story of Kate's wild Wasilla weekend of tears and strife with Sarah Palin - it's in the new ENQUIRER!