Spoiler (click to show/hide):
The trapping pens are nice because they don't kill the critter, so you can actually farm them. Like what's shown here:
https://manganelo.com/chapter/qc923430/chapter_15 Also, writing myself an out for finding resources close to base: the scouts aren't quite bright enough to be sent searching for multiple things at a time. You can send them on general scouting missions, or you can send them to look for specific types of resources.
Unfortunately, none of them really understand the more complex terms you use, and you're not able to make yourself understood on the 'fibrous' part. It's frustrating, but you'll probably just have to have them bring things back and look over it. You also notice they don't quite seem to have the concept of deadfalls down. Some of them are too small, others are so large they would reduce the animal to a paste. But... they're earnest, just not too bright. Irritating, but something you'll have to train them with and show them how. Most of them seem like they'll figure it out as they go along, improving over time.
They do have a bit of flint, but most of it is residual material brought in from the old hive, and you'll have to find a new supply. There are plenty of rock chips from where they dug into the walls and such, but none of it is flint, not that you'd want to live in a cave made of it anyway. You could tell the scouts to focus on finding flint or other building materials, but with their single mindedness, they'd likely overlook something obvious within the same area that is also valuable. Much of the issue is one of focus and time, if they're only looking for particular types of rocks, plants, or foods, they'll likely ignore the other possible items, allowing them to spend more time looking at what you've told them.