I have quite a disappointing answer for you. Really, Easter in Puerto Rico is a watered down version of the Spanish Easter. Some things are kept faithful (like bacalao, of course... it's basically eaten every day), but if there is a procession somewhere in the island it must be pretty small.
Mostly Easter is celebrated with families and/or in church. Although this is just coming from personal accounts, I haven't actually been in the island for Easter. So perhaps it is worth investigating yourself.
I personally blame it on Christmas since it is such a huge deal in Puerto Rico and it must wear everyone out. Not that that's necessarily a bad thing.
If anyone has an anecdote to share about Easter in the island, please share using our contact page.