'When the upstream end and payload were pushed into the current of a 12 foot ditch filled with fast flowing water, the current relatively rapidly swung the floating "pole" across to the other side, as the downstream end stayed in place and "hinged" on its tether to allow the door-closing effect.' [Yes, it did.]

So how did you cut a 50' tree down with the contents of your PSK??? [Perhaps it was not as prominent as intended, but the pole is to be several tree trunks lashed together for length. I EDC in the woods a combo-knife that includes a substantial bi-directional saw blade. My PSK does include a small wire saw that might help things along also. It is more than sufficient to cut down and trim small diameter, but tall trees, plus the scenario mentioned riverside debris that might include suitable pole material. The scenario said you had 50 feet of paracord plus the skill to make cordage, which would permit lashings.]

I did something like that when I was about 12, but I was the payload and I didn't use a tree. ... Anyway, there is a difference between floating and being the anchor... [Your adventure is significantly different than the solution suggested. The current leverages the pole against the pivot so current pushed it goes all the way across. You want to stay on the upstream side of the pole, I think.]

But I must say that you kept me entertained for almost four boring hours on I-5 last night! Thanks! [Welcome!]

I thought of every survival scenario that could be on my side of your river, and compared each one to the dangers of crossing the river.

.. Dweste, the problem with this scenario is that your river is the worst of the problems!

[What kind of wimpy scenario would it be if there was a clear, easy solution? And yes, the scenario solution must significantly reduce the threats of the river, even turn the river to your advantage. As much as possible tilt the odds in your favor of getting across relatively quickly to reduce exposure to river risks. I just made crossing the river a condition of the scenario because that is what I was interested in.]

[I appreciate your post as always, Sue. Maybe this one will spark another?]