Do you mean spring break? Just a guess.
But Rusty definitely fucked Arieth on the beach. You can see that in EP3 on a photo and in EP6 Rusty himself says that it took him a week to get the sand out of his ass cunt.
The DIK's, how many I don't know, still had contact with Vinny after he left. We will find out at the party after the cum petition in EP2.
Surfing is best in the sea, in my opinion. Beach is located by the sea. There is a possibility, just a possibility, that Zoey might know some DIK's or former DIK's.