Man I forgot I even made this thread. In fact, I came here again to research it and consider making a post. I'm screwed when I get legitimately old. Anyway I went out again this past weekend and did the Navy shower method and it worked well. 2 showers and I was still showing 2/3 of a tank, so I think if I'm judicious about that there's a 90% solution. Those Front Runner tanks are pretty slick, too bad they're so small though. I like the idea of the bladder, but have no idea where I'd put it. I don't think the gap on the roof of the truck is wide enough for it. I was kicking around the idea of a tank of water on a front hitch, seems a guy could get 30+ gallons up there without really hurting airflow to the radiator. Would improve the balance of the truck a little too. Use a pump to transfer it. I think someone may have mentioned it in this thread too.