if you are in a light vehicle, we always used to use a hand winch and a ground anchor from the staybacks used for power poles.
they are like a rod with an eye at one end and a screw at the other. all you do is screw them in at 45 degrees, then unscrew them when done winching. they get a bit bent but straighten up easy.
a clever dickie would weld a bracket on a waratah, to make it easier to get the high lift on it for extraction.
a type of anchor, or dead man that would be handy, and easy to make. (though require digging in). but still light and relatively small....
picture this if you will,
a steel plate of 3-5 mm about a foot square, (possibly folded over along the edges for strength)
hole cut in the centre to accept a length of 40 mm box, say a foot long
weld a tee on the end of the box so it can't slip thru the plate.
run a length of chain thru the box and put a large dee on each end, one for the winch, one to stop the whole lot pulling thru the plate.
the end result (if you follow that jumble) is a steel plate at 90 degrees to a bit of box, with a chain thu the lot.
can be slipped apart to stow and just needs digging in to a tee shaped hole.
i would even put a length of rope on one corner of the plate to winch it out after use.
cost bugger all, could be made in my shed in 20 minutes with just whats laying about, not built to be pretty, just practical