Port Mansfield is not very commercial at all. It seems like people own/rent homes or come in from neighboring towns to fish. If you are looking for a some low key fishing trip, this seems like the place. The water is not very deep here, averaging about 3.5 feet in depth which allows you to wade in the water with your fishing pole. If you are looking for more of a beach town, South Padre Island is not too far away.
Have you gone somewhere new recently?