I should mention that we typically outfit a group of 15 or more at least 10 times a year. These are river trips and back-country excursions in remote Utah. I've found over the years that you don't really need to waste money on ultra light tanks that you can see the level of fuel (save it for other gear) . Just refill before your trips and you'll save a lot of money. I hope that helps.
That works for frequent use, large groups and large fuel volume use but I'm 1 guy who has to watch the weight of the gear he drags along... it all adds up and affects payload, fuel economy and the amount of gear I have to load/unload. I also don't want to guess if I have enough fuel - being able to visually check the volume works for me, plus I haven't had to fill the tank in 2 years since I've had it... I don't use that much gas.
Thanks, but I'll waste my money on light weight and easy visualization of the amount of fuel I have.
