To the best of my memory (from the early 70's) the Ice Capades used the AC Convention Hall from about 4th of July to Labor Day. I don't know if they were performing public events or rehearsing a new show for the winter season, probably some of both.
Anyway, I remember them having about four lightweight stainless baggage cars they used for their equipment. The cars sat in the yard parallel to the Expressway during July-August, then loaded and sent north about Labor Day.
The PRSL moved the cars as an extra freight, actually referred to (perhaps informally) as an "Ice Capades Extra". When I was on the extra list I always hoped to get the call to work the job, and one Sunday in September I actually did. Ran light from Pavonia to AC. waited about an hour until the cars were finished loading, and then brought them back to Pavonia (via Clementon Branch) and cut them off on the Back Road.
It was a fun trip. Everybody on the crew was in a good mood. The engineer (Jimmy Marsh) put on a non-stop high-speed show and ran the job north like a first-class passenger train. There were no passengers, of course, but putting your head out the window looking back at the lightweight stainless cars gleaming in the sun, it was as close to a "streamliner" as you were going to get on the PRSL in the 70's.
Oh, and not too bad a day's work for a brakeman .... a total of 1 coupling (in AC), 1 uncouple (back at Pavonia), and 120 miles of fun for a day's pay.