That's funny ! And I needed to laugh.
We went to Pismo once, with out previous RV - 36' gasser pulling a 20' trailer loaded with 4 quads, dirt bikes and tools. I paid for an "escort", went at low tide, you drive on the hard pack sand near the wet line and when you get to where you want to be, you make a big looping 180 - making sure to stop at least 15' above the high tide line. It was a piece of cake ! More common sense that anything.
When the weekend arrived, I noticed (at low tide) many more RVs and toy haulers arriving and parking next to me, 2 deep closer to the water. They all hopped on their toys and went riding and hours later they had seawater in their trailers and RVs - not a good thing. I would have warned them, but I was out riding when they arrived......
Big picture - ask questions, ask locals, and if you have to pay an extra $15 do it !!
PS - the new rig is much heavier and I will never do it again. Any spot that is missing paint will have rust on in in 24 hours !!