I have lived in MS for over 50 years and have kept close watch on our gun laws for 30. The previous post is false regarding the vehicle principle - I've seen nothing in MS law that equates vehicles to residences. However it is correct that you're legal with guns in cars with a few exceptions.
I see no reason whatsoever for your concern. If it were me, I'd just case them all up, put them in my vehicle out of sight, and drive to Wiggins and unload. If you were to get stopped, there would be no legal problem provided none are stolen, there are no illegal drugs, you're not a prohibited person, you're not driving or parked on federal property, etc. I would be very careful about leaving the loaded vehicle parked and unattended anywhere along the way.
MS has a preemption law, so Wiggins can't have many gun laws. If you move outside the city limits there are probably no gun laws beyond state law. I believe at least one of the three coastal counties does have more restrictive ordinances.
Welcome to Mississippi! I shoot from my porch too.