i'm no expert so let met just give some tips.
bring a circular polarizer
definitely not high noon

always check the exposure compensation, since it's bright day, i lost some images because i had accidentally rotated the exposure compensation dial at the back of the cam.
use the flash for fill light (for people in the shots)
i bring almost the same thing, coincidentally, i'm going to the beach this weekend
Fisheye, UWA, telephoto, plastic fantastic (50 1.8), flash, tripod
but i'm still mulling the flash
i bought a new tripod though

Benro Flat Tripod, Carbon Fiber, 8kg capacity for just 1.1kg weight.
don't worry about the thread, it's the right place

sheep's just being sheep.