And that's what she did. 

She and Ryan went out again that night, and made the same rounds as before. Dema's shaman-sense was as good as a scanner, she could tell which bags she had already put chips in. Many of them were gone, but many remained, particularly in the caves that hadn't been accessible by boat the night before because the tide was too high. 

There were some other caves Ryan knew of that they hadn't checked yet, so they went to those and put chips in all the bags they found. When they were done they went back to Ryan's place.

When they got there, Ryan said, "You know, we'll have to keep going out until either all the bags are gone or we know they've been abandoned."

"I know," said Dema. She smiled at him. She didn't mind at all.