If you're a CPT worker, you're working on-call on a fill-in basis only. You do not have guaranteed hours. If you accept a shift, it is not guaranteed and can be cancelled.
It's generally an easy job, but at times it can be stressful if you have to help someone with a crisis or work with individuals who tend to have behaviours.
If you don't have a DSW or ECE, you have NO chance of career advancement within the association.