In my head "OVERLANDING" implies that you are completely off of any form of road...incorrect...for half the people out there sporting the "look" a paved/pot-holed road with no center lane stripes, into a developed campsite, is "overlanding". I love those guys, they end up selling their stuff for $.50 on the $1 after the reality of driving the monstrosity they built is a miserable commuter vehicle!
1. VERY RARE that I'll watch a U-Tube video, maybe a generational thing...those that know me know that I rarely even take pictures, much less demonstrate to the whole interweb that I kind of, sort of, really know what I'm doing, but have my moments.
2. Overlanding, tactical, Mil-Spec, etc...must not be much to see there, quality products hype themselves without the catch phrase/word. I've NEVER used any of those words when doing a product search..."4-season, 4 man tent" gets more options than "tactical 4 man tent"...just Googled it for amusement...this came up, actually kind of a cool looking tent for a minimalist
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https://www.amazon.com/catoma-stealth-tactical-tent-individual/dp/b008i7hrsk
3. I've used "adventure travel" over the years to describe what I/most of us do when telling others about my trips.
Basically, I take back roads/dirt roads when possible, sleep in a tent (these days). When things go wrong it makes a trip memorable ( the Baja 1000 delayed 24 hours by mud, as a recent example). I'm not a "prepper" but I usually have what I need to resolve the issue one way or another. An extra day of food/water/refreshments and other basic necessities weren't an issue for our group of 15 or so people at our pit location for the 1000, an extra day of doing nothing in Baja was tough, but we sucked it up!
Have fun out there, that's the important part!