Go to a local hardware store or major chain like Yardbirds or Orchard and have a look at their selection before you order the Gerber. Heck, they probably have the Gerber also...
In the woods, my SAK saw will often take care of business, though it is smaller than what you are after. I have also carried a generic plastic orange-handled saw with about an 8 inch blade, but right now, since I broke the last plastic one, I have a wooden handled "Corona" with the biggest saw teeth I've ever seen. Its a whole foot long and cuts on both the pull and push stroke. A little long for my pack most of the time, but if I know I have to cut some serious wood, this is the one I would take. It only costs about $12 or so at OSH.