A: So you flipped over cards from the draw pile into the discard pile (ignoring New Rules and Goals, but executing any Actions) and no Keepers were revealed.
Rather than reshuffling the discard pile into a new draw pile, and continuing to flip cards and execute Actions, instead start looking down through the discard pile without executing any Actions you come to, until you come to the most recent Keeper discarded.
If you don’t find any Keepers after getting to the bottom of the discard pile, you can safely conclude there are simply no Keepers in the deck. They’re all either in play, or in someone’s hand.
In that case, you just don’t find a Keeper (or Creeper) to play. Reshuffle the discard pile into a fresh draw pile, and start the new discard with the Expotition/Curiouser card.
Rather amusingly, in the case of Hundred Acre Wood Fluxx, this means that your expedition ended exactly the way it did in the story: you didn’t find the North Pole. In fact, you didn’t even find someplace to pretend was the North Pole.
We will be updating these cards card on future printings to make these the explicit directions.