For the cheat option, assign a smith or seamstress from your slavers or obedient slaves, then you can right click on the camp rolls and select the crafting option. That gives you a menu with the various crafting choices, go top down since the lower options tend to remove upper options. So choosing the modest option removes the type (ranger, rogue, exc.) options listed above it and sets it to random.
Also, you can only cheat crafting you have an assigned person to, not ones that you've bought an encampment upgrade for.