S.R.
heres the thing ive learned about beach trips. Dont take too many things!! you will definitely lose something you needed or end up so pissed that you have all this junk to lug that it will make the trip overly stressful!
i actually live right next to newport beach, i love it (its not hawaii, but i take what i can get! lol)
a five month old does need toys at the beach or anything (you can bring some for the hotel or whatever, just dont bring them to the beach)
my five month old was so intrigued by the sand that he didnt care about toys.
here are some basic things you will want to remember:
* Sunblock
* Hats
* towel
* swimsuit
* food or snacks
* sandals
* shorts
* tank tops
* diapers
* extra outfit for baby
* sweaters (ONLY if you are staying after 4pm)
* CAMERA
* cash (but not too much)
* put everything in a back pack to carry it to the beach.
Have fun!