Bob zealously intends to live off the land and fishes for a trout, while the rest of the family, much less impressed, borrow food supplies from their neighbors for dinner.
They wash ashore far down the river naked and lost, and Bob becomes violently sick from the trout he caught and ate earlier.
In the morning, the kids wake to find Bob and Linda missing and borrow some inner tubes and a "Survivalist Guide" from their neighbors to go search for their parents.
At nightfall, Bob and Linda continue to follow the river back to the campsite, while Tina, Gene, and Louise come upon a Thunder Girl troupe campfire.
However, Tina defiantly renounces her Thunder Girl membership, quoting from the Survivalist Guide about how such organizations are "cookie selling machines".
In the chaos of the bee attack, Bob and Linda are able to escape the trailer and the Belchers flee in their car back to the city.