Where do the Pace bus supposed to stop at.. drop a pace handy cap person off.

In front of the Pier

Free trolley also known as pace bus... there is a lot of information regarding transportation on Navy Pier website.

I believe there is a bus drop off / pick up along with taxi and ride-sharing right in the front of the Pier. However, I'm unsure about Pace.

Sorry, I don't know. I don't take the Pace Bus.