Rotopax or other gas containers mounted in 1st gen tacoma bed?

No doubt. I also carry a 2 gallon rotopax for that exact scenario.

The other advantage to the tilting bottom storage is you can do one can fuel, one can water, or beer, or tequila.

 

I like this idea. I think I'll put tequila in my washer fluid bottle and beer under the bed!

 

Call it On board tequila. I like it.

I already have the correct windshield washer bottle too.

 

there was discussion of mounting a aux tank where the spare tire went.

 

I have a solution for this. Dry disconnects. Just disconnect the tank and plug in a hose. Turn on the pump and instead of filling the stock tank you’re pumping the fuel to another vehicle.

The disconnects just showed up a few weeks ago. I just have to put them in.

 

Interested to see how this all is set up

 

Yeah, the concern is 'what happens if you get into a rear end accident?'

 

That's a real concern. The answer isn't simple either.

On one hand...
There are plenty of vehicles with rear mounted fuel tanks on the road...including the 1990 ford F-150 I got the tank out of. This isn't the end all be all answer. A 1990 Ford F150 has 1980's safety tech after all. But you don't hear about those exploding in rear end collisions.
Of course, vehicles with stock rear mounted fuel tanks were engineered and built that way.
The gas tank I used is DOT approved etc.
When I pulled the tank from the F-150 I took a look at how the tank is built and positioned in that truck and took that design into consideration when building mine.
I have frame reinforcement plates and part of the fuel tank mount are a pair of 3"x1" .063 wall thickness steel tubes welded into the frame C channel going from one frame member to the other. Between those two the frame should be a lot stronger...which might not actually be good in a rear ending.
The extra tank is higher up than the spare tire and actually recessed above and behind the trailer hitch. It is pretty well protected under the truck. I doubt a car will be able to go under the truck and hit it. I have dented it off roading on rocks etc. It's metal and the dents are easy to push out. If it were plastic I'd be more concerned about plastic breaking.

On the other hand...
I'm not an engineer, although I did consult with a few before/while doing this (none of which were automotive engineers). And anything is possible. You can't account for 100% of all the things that can go wrong. Unless you want to do years of testing and work at a car company with an automotive engineering culture to draw from.

In short...
like any mod there are drawbacks and risks...pros and cons. If you don't like those risks don't do it.
I have my aux tank in my build thread. I'm a little vague about how I built it. If you can't figure out how to do it on your own you shouldn't be adding a second fuel tank to your truck.

 

Yeah, I believe what some have said on other forums is that if you have the tow hitch it should provide some additional safety measures. Its def a good spot for battery bank/aux tank if the spare tire was relocated though. Lots of room down there.

 

For sure...great spot for a battery. Nice and low center of gravity.

My spare tire is a pain in the ass. It's on top my sleeping platform behind the fridge. So, if I get a flat tire the fridge has to come out first. A swing out would be great but I'm holding off on any mods for a bit.

 

mm, you right bout that.