I'd say fuck all -
to the printed slush of other authors; & i'd slap a yellow industrial note pad and two pencils with a plastic hand sharpener into my rucksack. (Use pencil because shit gets wet at the beach and last thing you want happening is pen smearing with wet inkblots, turning your writing into a rorschach test.)
I went to the beach with my family for a pre-return to the daily grind/summer-end blues; & I brought my mini pipe and a half oz. of indica. I wrote a tad bit, but mostly enjoyed the wooshing waves.
So enjoy the waves the sand and life. Henry Miller is a prophetic example of 'fuckall' grabbing life by the balls and castrating, just to watch it bleed.