Try a sheep shank to create a loop, then run round the peg and tie off. This gives you an easily tensioned and tied off pulley system.
You could also use a truckers hitch in much the same way, but my scout leader was a fan of the sheep shank and it's rubbed off on me.
It's slightly slower to adjust than a midshipman's hitch but it also holds better under ...
First, try with more 'coils', when you tie the taut-line hitch; every coil adds some friction.
An alternative, that I, myself, like a lot, since I find it easier to tie, is the Farrimond Friction Hitch. And again here, if your rope is slippery, wet or stiff, add some more loops/coils, and make sure you 'dress' the hitch so it's good and tight.
A major ...
I'd advise against plugging in a 30 to 15 amp converter and using it directly.
If something short circuits in your 15 amp cabling it might not be enough to trip the 30 amp breaker (if there even is one) on the electricity pole.
As noted in the description it's made for RV's and in my experience those always have a breaker panel inside to provide the required ...
Notice that the ad says:
For use when RV has 15 AMP power and needs to plug into 30 AMP power source
Now notice the 15 Amp receptacle side of the adaptor:
This is a standard household outlet, which I suspect matches your charger's plug.
I.e. if you rent the 15A hookup, you shouldn't need an adaptor.
(But it's good to confirm this when making the ...