I don't think there is any single option that works in every scenario. Assuming we're only talking "hunting"....the only thing I currently hunt with a rifle is the lowly groundhog. Target is usually small, and usually 150-300 yards away~so a rock-steady rest is req. I use a swiveling Harris Bipod, 9-13" and shoot prone. I only take maybe 2-3 offhand shots a season on close ones, so bipod weight isn't that big a concern. Being a heavy-barrel varmint gun...I sling carry it muzzle-down, so no issue with the bipod digging into my back.
I have been contemplating getting back into coyote hunting, where lying prone in the snow just won't work. So, I read this entire thread looking for opinions too. I have that "Varmint Al" page bookmarked on my home computer, and thought I might whittle-up something like that to try out.