If you already have some garden stakes (or somethign similar) set up something like you have in the video and test it out at home, you can learn a lot about what works and what doesn't with dry fire practies or just playing with ideas.
If you are have time to set up a tripod in your intended shooting situation a carbon fibre tripod is an excellent option for building a stable shooting platform in basically in the field.
The downside are, that they aren't cheap, take a bit of setting up (with practise this can pretty quick), and they are can be annoying to carry if your pack doesn't have decent side straps.
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