[MattHelm21]

Well, this is personal opinion but having a gas gan or vehicle with a gas tank in the Toyhauler is inherently more dangerous than not having one. That being said, the Toy Hauler section is designed with additional venting to minimize problems. Ignition sources should be mostly eliminated as well. I would consider that the venting is not doing much when the rig isn't moving so when you're parked the same potential for vapor accumulation exists with the possible exception being that gas fumes are heavier than air and should exit via the lower vent possibly before reaching an explosive level.

Lastly, the link to the jug on Amazon seems to indicate a product which is using a loophole(my opinion) to not have to meet the same safety requirements(is it DOT?) as most jugs. I would want to use approved containers which had to meet a minimum standard before venting or failure.