Unfortunately, this area is too far for me. I live in the east of France, there's so many distance to go. I would have liked to take a look anyway. In my case, what interests me particularly is that I would like to sink me slowly and completely in the mud, without bending your legs. My ideal fetish would be to sink completly, with a thick and tight zentai.
In this context, do you know where mudflats are the deepest in the world ? In France, I think are locate at Mont Saint-Michel. Generally, it is difficult to sink above her waist, because there are not enough mud. On some videos, many people cheat by bending the legs.
Have you ever locate mudflats with a depth greater than 2 meter ? Can we get bogged down completely if it is deep enough ? In the mud of a mudflat, Archimedes' principle should not apply as well as in a pure quicksand. The mixture density is slightly upper, and some clays may be heavy.
Finally, since we can not completely sink in quicksand because our density is too low (d~1) compared with quicksand (d~2), and that the density of quicksand is difficult to reduced without altering its property, can we not imagine to increase the density of the human body by adding heavy loads (weight belts, heavy combination, bag full of stones, etc. ..) ? By moving boards one by one, it would be sufficient to achieve a deep zone, and then let down. Has anyone ever tried this type of experience ?