Dungeon Smash- I have no doubt a trap fence of the dimensions you propose will work, but, that's an enormous undertaking! I've never found it necessary to go to such lengths.
There are a lot of tiny lakes. I build a trap fence around these, although, in fact, I've never actually encompassed more than half their circumference. Still, I've never had to completely surround such lakes in order to catch a lot of deer, elk, bear, and such as they come to drink. The few times I've built a trap fence that did not utilize a lake, I've had little luck.
The nature of the trap fences I've made seems to be a great success the first year, especially in winter, and then only an occasional catch thereafter. I suppose it takes a while for the wildlife to recover in the area. lol...After I've done as much fencing as I can stand, I find I've left about half a lake uncovered. It still works, though, because when they wander in between the lake and my fence, they wind up getting caught trying to leave through the 'gaps' in the fence.
Anyway, I appreciate the amount of work you put in constructing fences so grand. After I've constructed my more diminutive fences, I'm quite happy to be done with that...lol.