If you can't keep a gas can inside your TV, then how on earth are you supposed to fill up the gas can in the first place?  Strap it on top of the vehicle?

Regulations state that gasoline must be transported in DOT approved containers, but I've not seen any regulations that prohibit you from carrying gas cans in a travel trailer or a TV.  Granted, keeping it outside would be optimal, but I just don't see a way to effectively keep thieves away.

We're actually gearing up for a month long trip in our Pod to Oregon and California.  We should be at Lake Tahoe this weekend. 

I keep a 5 gallon plastic gas can, the kind you find everywhere, in the back of our TV, a 2005 GMC Envoy XL, right next to our generator, a Yamaha 2400 iSHC.  These cans should be sealed up very tightly and are designed to keep the light ends (i.e. gasoline vapors) in the gasoline where they belong.  We have high seats between the can and us, so I'm not concerned about the can becoming a projectile in the event of a collision.

I absolutely despise the 'new' filler-caps they put on gas cans now, so I just siphon the gasoline from the can directly into the fuel tank of the generator.  I made a siphon from about 8 feet of 3/8" fuel line from Napa and a 3/8" siphon bulb.  This is far more durable than the little red siphons they sell at AutoZone and the like; I've heard nothing good about those.

If you store the gasoline on the Pod, it must be secured in such a way as to prevent theft, a process that can be very difficult as someone might be able to just siphon the gas out of the container.  If you used a marine-type fuel tank, which typically has a low profile, you could store it in the Pod's exterior storage unit quite safely and away from would-be thieves.