PB is not all inclusive. Admission is very cheap - $3 maybe, and they ask you spend $10 in food or drink, though they don't hold you to that as I could tell. A wristband to use the inflatables is another $15. It's super clean, the service was excellent. I'd easily go again.
If you are a big eater and drinker, an all inclusive might be a good deal. For us, PB was much cheaper per person.
Getting there, or any beach, is super cheap. You don't need to pay for
DCL excursions. There is a taxi stand with cars and vans standing by straight off the pier, with lists of prices to the various beaches. No haggling, no flagging down taxis.