CP would be the most important thing really.
dun be kancheong about sand and stuff. just wipe camera and lenses down with a slghtly damn cloth when u get home. thats what i do after beach shoots.
lolx, u better watch out when there are strong wind blowing at you, then you take a look at ur lens and will notice that there are some fine sands on ur Filter(i assume that u using filter). just remember to use ur lens cap when u are not shooting.