I know this thread was from last year, but ... Q: How bad is the swamp? Reason I ask is b/c - buy some waders & go in after him!!
Seriously, I've got some land that's soupy/swampy, and that's exactly what I've done before, with success. Is it a pain - sure, but ... I've kinda got an attitude of "do whatever it takes".
If you can't afford waders, borrow some. If it's real soupy/swampy, you could also borrow a very small jon boat... Again, get creative; I've usually found that, where there's a will, there's a WAY!