HuntingNet.com Forums - hi-tech hog hunting:thermal eye

I’m currently looking for something new for myself for night hunting and daytime as well.
Guys, I need help. Could you recommend a good heatvision system? That might sound crazy, as they say, but I desperately need it for hog hunting. Such devises like http://www.opticsplanet.net/atn-250d-mm-thermal-eye-camera.html are really good and they worse it, but can I use it to see a hog behind a bunch of trees? In other words, what sort of thermo-visor can I use to see an animal (or at least some arising heat from it) behind trees and other small objects?
If you don’t know anything specific, could you at least recommend me a website to ask hunters about the heat visors (thermo-visors)?
Regards,
Ivan