I know that this is an old post but I just wanted to thank everyone who posted for the ideas, which are surprisingly scarce elsewhere on the interwebs. I've also gotten ideas from Mr. Chickadee on youtube and Jim Thode's video's where he's single bucking much biger PNW timber than I come across in the Colorado rockies. I've picked up a few one man crosscut and bucksaws over the past couple of years and recently got out to cut some firewood, but realized beforehand the importance of proper workholding.
The obvious play was rolling a chunk of log underneith and hammering in a log dog, but picking up and/or rolling heavy logs requires either a lot of physical effort or carring a high lift jack and chain into the woods, which is heavy extra equipment. I'm in a situation where driving off a forest service road with motorized equipment is not allowed, so that means moving stuff with a wheelbarrow, so I wanted to keep weight low.
As other posters have noted, the top arms of the 'v' of my sawbuck are much longer than necessary, and will soon be cut down based on the wear I notice. I also use a rope loop with a board through the loop that is stepped on with one foot as a clamp to keep both hands free for running the saw, which makes a big difference in speed and power. That said, the sawbuck I only use for small stuff to avoid lifting heavy logs solo. I like the folding design because I can fold it up and carry it into around on the wheelbarrow, and its easier to stow in my truck when the bed is full of rounds.
My first workholding is a log jack, although it doesnt hold light matedial solid enough, but when the log is heavy and cutting the first rounds from the base of the tree its stable. The log jack only lifts the log six inches off the ground though, so I have to finish my cuts kneeling on the ground to keep the saw out of the dirt.
As soon as I can pick one end of the log up (helped by an old ice tongs) I place it on a small three leg x brace and can saw standing. In the photo you can see I made this out of dimensional lumber as well because I'm a carpenter and thats what I have lying around. A couple of pieces of metal rafter strapping keep the legs from spreading when a log is dropped in. Once again, the arms of the v the log rests in are too long and will be cut shorter so that I dont have to lift the log as high to place it in the cradle.
Lastly the buck saw resting against the sawbuck is one I made from a piece of 1095 spring steel and copies a four cutter to the raker pattern copied from a swede saw, the frame is white ash. Metal bowsaws are awesome if you dont sharpen your own saws, but I never liked the flex in the blade of a bowsaw so I made my own. Plus having a handle for the saw placed below the tooth line helps the teeth dig in when pulling back on the return stroke, which is something you see on vintage swede saws and modern racing bow saws but is absent from the modern ones bought today. Since these saws cut on both the push and the pull stroke it tends to make for a faster easier to use saw, though it necessitates holding the saw with two hands.
As others have noted the sawbuck is handsaw era technology. When I run a power saw the only tool I carry is the log jack. I'm lucky to only have a 5 minute drive to where I'm
cutting firewood so going out for an afternoon every weekend is fun for me with the crosscuts, and between that and hand splitting is my gym at this point. In a full afternoon I can buck about a half cord. With all the beetle kill pine in my part of the world I don't have to fall any trees either, just limbing with the axe and get to sawing.