there's all sorts of folding wheel chocks out there..
https://www.google.com/search?q=folding+wheel+chocks
me my Parking brake holds very well and if not I'll use a piece of firewood or a nearby rock etc..
I have an all in one Diesel heater (has a carry handle and a contained 0.5l fuel tank.
have an exhaust extension made from 3/4in conduit and use the 3in duct to connect to the upper tent.
it has a key fob remote, so fire it up when the chill gets to me,
$120 shipped. and some have a wireless...
it's soo much tougher when they're still looking for one of their pack to come home..
they just don't understand..
we had a brother/sister pair and when the brother went 1st from illness his sister was vigilant and would howl calling out for him for a few days/week
I sat with her on the sofa...
most people who 'write a book' aren't actually the ones writing it.
your thread here and some additional conversation would be enough to compose a few books on your travels & experiences of the 'american scene'