After reading this I walked outside.
Every vehicle is a Toyota except for one Izuz D-Max
There's 4 dual cab Hilux, 4 Trayback 79 Series V8's, 1 Trayback 76 Series V8 wagon, and one 1HZ 6cyl 78 Series troopy.
All these vehicles are of course diesels, and I'm of course in Australia :-)
Just checked google earth, I'm about 550-600km as the crow flies from my nearest McDonalds.
By road (track really) it's about 500km of gravel/sand that has a few wheel tracks to show the way, then a few hundred km's of bitumen.
Can't beleive there are 4 pages of talk about Suzuki's in South America and nobody has mentioned the Top Gear Bolivia Challenge?
That's the link to Part 1 of it, the 3 hosts buy 3 cheap 4wd's and do a trip :)
Just a happy snap from work, 5 troopys, 2 Navaras, and a Hilux, all diesel.
Another 5 troopys and a Navara out in the field when the photo was taken.
It's good to get paid to do expeditions for a living in troopys :)
I'm glad I come from Australia where people DO buy brand new landcruisers to drive in a "hardcore" way. Same with Nissans and Landrovers, all of which are offered with a solid front axle
Ie Landcruiser 70 (wagon, troppy and trayback)
Nissan Patrol GU (wagon and trayback)
Simplest option I can forsee would be the pump out the main tank option...
Even if you're not planning to run off your aux tank, its worthwhile making sure you can re-plumb to it should you ever get a hole whilst out in the sticks.
Where abouts are you in the world? The ambient temperature these vehicles are operating in would have a big impact on this.
While you might get away with driving at highway speeds in winter with your electric fan, it might not be as good working hard in soft sand at the height of summer.
I spend a lot of time in the drilling industry where the majority of light vehicles are Toyotas (Hilux dualcabs, landcruiser traybacks and 105 series wagons). Some of them arive with the genuine toyota covers, others arive without covers and we order them from Black Duck. The black duck covers...
If they're the manufacturer of the "Genuine" Toyota canvas seat covers, they're not the best in the market in my opinion.
Have a look for some Black Duck seat covers, much nicer product (but like a good pair of boots they'll take a little while to wear in)