Ok so I have had a dormant fetish toward sinking in mud/sand/clay since I was around 10 yo. My brother and I (my idea) made a mud trap and trapped one of his friends. He started crying so I panicked. I ran and got a 2x4 to pry his feet out. I also recall a brick factory where I used to live (south side of Chicago) which had its own clayhole. I am a baby boomer and there were as many as a dozen kids swimming, wading, and of course playing mud monster. The clay was absolutely homogeneous and not too sticky. I thick that was the best clay I have ever experienced to date. I may have a gravel pit silt pond scouted but I want more experience before venturing into that. I did find real knee deep quicksand there and I could tell that being alone kind made me cautious. There was deeper.
Ok, so for the question. For the last couple days I have been scouting sinking locations. I have found a few... mostly knee deep and not too hard to get out of. Well today I hit the jackpot. Heavy clay and I am pretty sure that if I work at it I will sink to my waist at least. My concern is that I could become seriously stuck with nothing to pull on. I am wondering if I work it alot will it be less sticky? I have decided to keep a rope handy just in case I have problems getting out. Has anyone ever been in this situation? Could you give me some advise? I am planning on leaving in an hour or so to go "fishing"

.
Any advise is greatly appreciated.