I only have a 25 gallon gas tank in my Silverado so I知 thinking about purchasing a 14 gallon jerry can for our travels. How do I safely fill the jerry can and safely top off my truck when on the road. I知 hauling a 5th wheel so if I need to get it on the ground, I cannot roll it out. I would need to lift it (115 lbs when full) over the side. Any recommendations would be helpful.