One my co-workers--the guy who first showed me Casita
trailers online--goes to Myrtle Beach State Park with his Casita
fairly often. He rather likes camping there (I think his favorite campground is the one at Myrtle Beach State Park). He once saw an Oxygen
trailer there, but the owner wasn't around to show it off.
We haven't taken our trailer to the beach area, yet. My wife and I prefer mountain camping. But we do have a trip planned to Hilton Head Island in May.