Visible crew/equipment: When the Critters are in the restaurant, The Hungry Heffer, as the camera pans across some Critters eating lettuce and other food. If you look closely, you can see one of the puppeteers hands coming out of the bottom of a critter puppet. The puppeteer is wearing a dark shirt with what look like gloves.
Visible crew/equipment: Toward the end of the film when the critter ball enters town and the truck swerves to the left of the ball, you can see the feet of a crew member running behind the ball, pushing it along the street.
Answer: From what I recall, Charlie followed the bounty hunters as they walked away in the first film. So the implication is that they decided to let him tag along with them. (And that makes sense. After all, he helped them destroy the Krites in the first film, so he'd be useful.)
TedStixon