Disagree with not dropping tyre pressures on the trailer. We have a Trak Shak that has been towed over the country into quite a few different areas. Think about walking in soft sand and how your foot sinks into the sand. Now think what would happen if you were to spread that weight out over a bigger footprint - it wouldn't sink in as much.
It's the same thing with the tyres. It's all good on harder sand but once you hit that real soft stuff your trailer tyres will try and dig in - they won't float over the top of the sand.
BTW - biggest tip is don't go for tight turns as your trailer tyres turn in a different arc to your vehicle. Try and plan exits etc from the beach so you do a wide arc and hit the soft stuff already with the vehicle and trailer straightened up.
Cheers
Chris
