Looking for help from recent Princess cruisers. Hello fellow Princess Cruisers.  It has been some time since I have cruised Princess and I have forgotten how to book specialty dining, spa treatments and the occasional shore excursions using OBC.  I would like to book some of these before they are all sold out for an August cruise.  I dont want to wait until we are onboard but I seem to recall that when I do any of the above early on the app or online I need to pay for them immediatly with a