score:3
Well it turns out that Cape May has a beach guide online.
It lists details of 14 beaches in the area.
Each entry begins with "Beach Fees". The following beaches are free, as in you don't need a beach tag:
Upvote:3
The previous answer's link is no longer active. Here is an updated answer for 2018.
The following town's beaches are free:
Wildwood Crest
Atlantic City (38 miles north of Cape May)
All other oceanfront beaches in Cape May and Atlantic Counties charge a fee during the summer season.