If you decide to actually go into the sand, air down, follow tire tracks until you find "The Spot" then park. Don't go off the beaten path unless you have to and bring some wood planks and a shovel or two. Been camping at Pismo for the last 6 years and this is how my sister and bro-in-law do it and we've never been stuck yet. I don't have my own personal experience as I've only had my TT for a week now, just observations.
2014 F-150 SCREW Ecoboost 4x4.
2014 Rockwood Roo 233s GVWR #6402