If flash, watch out.
I recycle point and shoot disposables, and load them with (push processed) tri x/hp5, since they were originally equipped with 800asa C-41 film.
Do take care that the B&W camera you mention indeed has conventional film; it mght be something like ilford's xp-2 designed to process in C-41?
The other warning is that if the cameras have a flash, as many of the kodak's do, then the flash capacitor board can pack a mighty tingle if you are feeling around at the wrong place.
As the other poster noted, the film usually is wound back into the cassette. It is almost always directly driven by the film advannce wheel.