They also knew that what Evelyn was suggesting was risky. They heard what Hugo said, and they believed it. But what if what Evelyn was saying was true? What if it was gonna happen? What if the zombies keep trooping in till the next day? That would be really bad 'cause they'll surely get bitten.
They wanted to get out of this hill, they wanted to move forward. And to do that, they'll need to jump past these zombies. All of them were feeling hungry, they wanted to eat something. It doesn't matter if the food with them was close to finishing, they still wanted to eat something.
And they wouldn't be able to do that here, as far as the zombies keep attacking. At that moment, they were confused as to what they'll give Hugo as answer. Vera convinced herself that they should try out what Evelyn was suggesting, and she voiced it out,
"What don't we try out Evelyn's suggestion? What if truly the zombies keep trooping in till the next day? We wouldn't be able to survive till then".