For those gritty-salty conditions I'd probably not go overboard on price, actually, you might want a pretty nice one to not-think about and possibly a cheapie that you don't mind sacrificing if you *know* you're dealing with blowing sand. (Also if there's likely to be droplets on your lens, one reason to have spare filters is cause it's quicker than trying to clean them.
)
I'd avoid Heliopans for the purpose, historically they're optically very nice but the coatings are somewhat soft in order to accomplish this.
Definitely use that hood, though,