Keep in mind that when towing on the low tide that the sand is hard because it is wet, salt water wet.
Not a real big issue on most vehicles as the underbody paint protection is very good.
But on a camper you should get underneath before you go and spray a good coating of inhibitor into all of the cracks and crevices where the steel tubes and plates meet.
This is where damaging corrosion will begin, in between the steel joins and contact points.
- Darren