Not sure about actual product recommendations (I'm new ) but you can buy small airplane size containers at Target or Walmart and fill them with your own product so you don't have to buy all trial.

My stylist has told me that before you get in a chlorine pool to wet you hair and then put a leave in before you get in. I'm also guessing you will want to DT with lots of moisture after the ocean.
3b curly starting to experiment with product again!