Well, Andy, I had a tremendous amount of fun back in the day with what I -- and most these days -- would consider substandard equipment. Part of it was how little I had, and part of it was bike-touring-specific kit back then wasn't what it is now. Some photographic examples here:
http://www.thorncycles.co.uk/forums/index.php?topic=3896.msg18979#msg18979And you know what? It didn't matter a whit. I still had a wonderful time, and many happy memories to show for it.
I do recall none of it stopped me from riding 8,000-12,000mi/13,000-19,000km a year like clockwork, and an appalling amount of it in Nike Waffle trainers, which pretty well did my feet in. I also remember emptying out my water bottles to make for less weight on stiff climbs. I took every advantage I could when climbing 20% grades in a 38.6" (40-28t) low gear. How could I possibly wreck my knees? I was using my lowest gear, after all.
It is worth remembering the astonishing number of people who have crossed the globe and circled the world on coaster-braked single-speeds, and before that, on penny-farthings. Every once in awhile, I'll air-up the tires on my father's 1938 Hercules coaster-brake bike and have another go on it to remind me how lucky I am to also have bikes with multiple gears to choose from, and real brakes. It's a white-knuckle experience to take the Herc down my version of "repack mountain" and the brake always has to be disassembled and regreased afterward.
My guess is these folks you're encountering are doing what they can, as they can, with what they have. If it comes down to trip /or/ equipment...well, they're out there and going! We mustn't let the odd slight imperfection be an impediment -- go for it, man! Yes, tarps are entirely viable and all tents looks the same with your eyes closed. The US Motel 6 lodging chain made an entire add campaign on that basis, basically saying "Our cheap rooms look like the fancy once when you close your eyes".
Looking forward to your tour reports, Andy! Pictures! We'll want pictures on your return, so don't forget the camera!
All the best,
Dan.