Just a comment on the OP for anyone unfamiliar with hand propping. Consider this an 'emergency procedure'. Find someone with a metric s()*! ton of time with small aircraft and have them show you the basics of hand propping. Then PRACTICE IT! You know, with your buddy riding the brakes and throttle and you swinging the prop. And do it near your hanger preferably on pavement. Once you find the right combo for your particular aircraft, start practicing with a cold engine. Then a hot engine. Find out what you need to do differently and keep that in mind. If you fly floats or skis, find out what particulars you need to practice for those configurations. And remember to practice safely. In the real world, starting the aircraft won't help if you have a broken arm or skull (or the aircraft leaves without you).
Then go get a jump pack and keep it charged and in the aircraft. Hopefully the jump pack will work for you. But IF IT DOESN'T you now know how to hand prop the engine and fly home.
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...and that, I believe, is that. Best advice (at least IMO) on this thread.