ATV is the way to go, I used mine in bringing 2- 300 lb deer last year at the same time, had one on the front and the other on back, its got a 2000 lb waren winch that comes in handy in hoisting the animals.
The one I have is a Honda foreman 450 and is a full time 4 wheel drive and a real work horse as I use it all winter in plowing the drive, oh-boy oh-boy