It was actually really easy, it's all about suitable tyre pressure. Our last trip to Moreton was the first time I'd used this trailer, and also the first time on sand with the smaller 215/75R15 MTs so a bit of experimenting was involved. I initially aired down to 15PSI (easier to drop more air than put it back in) which was fine until we had to cross the beach into the bypass. As soon as I hit soft sand I felt it dig in. Tried backing up but only moved about a foot. I then dropped down to 12PSI and backed straight out. had another go with no problem at all. 12 PSI was the winner on the day.
I never make high speed runs at soft sand, there's no need if your tyre pressure is correct. We explored a few campsites before settling on one and each time it was done in low range, first gear at 2000 - 3000 RPM.
I've been sand driving for 20 years and have made a lot of mistakes along the way, it's a learning curve. I drive to suit the conditions and am conscious of the pressures I run on. Every vehicle is different. Tyre size, Vehicle weight, sand temperature all play a part in what pressure to run. Ultimately no vehicle should have to be flogged just to get over a bit of soft sand. Just remember with soft tyres you can't go doing donuts and the like as you will roll your tyre off the rim and probably put the car on its' side.