yah that electric fence thing.. what happens when it's taken to ground, now you have an electric 'field' in the puddles around the insulator that is under water?
I work in a power plant, Ive seen many bad things happen when voltage goes to ground, maybe IM a bit paranoid but, another thing to think about. The tractor is a rickety heap, im surprised they have not gotten tetanus just looking at it I do probably at some point need to build something better. Probably something more permanent and absolutely, higher, with pumped drainage even if need be the few times a year stuff like this happens.
Aaron
edit: I was going to post a video of something going kaboom but seems ya'all dont allow mp4 posts. oh well