Let me draw a crude map (not to scale).
///////// ///////////Telson AFB//////////////////Turnstile///////////////
//////// //////////////////////////////////////////////////////////////////
Ocean ////////////Southport//////////////////////////////////////////
////////// /////////////////////////////////////////////////////////////////
////////// ///////Surf Point///////////////////////////Iselia/////////////
//////// ///Cobia Bay/////////////////////////////////////////////////
//////// //////////////////////////////////////////////Sycamore/////
//////////////////////////////////////////////////////////////
//Neptune City////////////////////////////////////////////
------------------------------------------------
Southport, Surfpoint and Cobia Bay are medium (~15,000 - 20,000 people) sized beachfront towns.
Turnstile, Sycamore and Iselia are medium (~15,000 - 20,000 people) sized inland towns.
Neptune City is a very large (population ~545,000) coastal city.