Have you been to Canada? Whereabouts were you thinking? There are a lot of hunting outfits right across the country, might do to contact some and ask them how you'd go about looking for work in the field etc?
My advice is Northern Ontario, Alberta or British Columbia. Lots of fishing, lots of hunting, lots of great country. Be forewarned tho: it's colder than the proverbial witch's tit in winter. Like, frozen nose hair kinda cold