"cache" is a wide open interpretation and often misused - when you start talking about 100s of miles of possible post-SHTF travel you want more than a "cache" - because you should have a fuel depot stash at the necessary re-fuel points - could mean four or more 5 gallon fuel containers - a buried PVC pipe with energy bars won't be doing diddly for you with a stranded car ....
The podcast was based on the idea that driving was not an option. It was more of an exercise in considering problems from multiple angles. The obvious answer was to find a job that did not require frequent travel. The other consideration was many people are not physically equipped for that kind of travel, so they would need to have a closer bug out option. After listening to the podcast I plan on taking a day to see how far I can reasonably travel loaded down, once gardening and winter prep is done.
Yes, I prep or am prepared at work, that is why my boss calls me Radar. I am usually walking thru the door or having taken care of things before he yells for it. Always looking ahead and behind but also knowing the people you work with will helps. I know personalities/employees so knowing how each employee will react is very helpful.
Caches have a way of getting found by people you don't want to find them yet seem to be impossible to locate when you need them. I've read of caches that were carefully concealed in the woods quite a ways away from trails and other popular area that had been ransacked when checked a few weeks later. Curious to see how others conceal and then locate when needed. In addition how do you package so the contents is protected.
Used to ''work'' at 2 remote locations a few miles inland from the Gulf coast. Had 3 boats with engines,2 without. Both locations are self-contained,Nat gas generators,stocked can food,Plenty catfish and gators...things like that Fresh water wells too,Fellow could hang tough for months out there. Now I hang out with the wife and dogs,Have a deer camp too....Buggers mowed down everything I planted...I'll fix that when it cools off and in season.
Bury under rocks that appear too large to bother moving. Using a lensatic compass and a good topo map, take at least 4 bearings to landmarks that won't change. And put couple niobium magnets under the rocks. Scatter a bunch of junk iron/steel hardware all over the area to mess with the metal detectors. You trusty compass, (attached to the end of a stick to save your back), will respond nicely to the magnets.
I do prep at work....but given 99% of my work happens within a hundred yards or so, of my house, it makes it fairly easy to do.