Just another comment on the subject, be careful of your state regulations about transporting large quantities of fuel.

I think there are quite a few restrictions and permit/license requirements in some states and if you get caught the fines are huge and I think the charges would be for a federal offense and could involve jail time.

Just check out your states & federal rules on transporting fuel thoroughly to be safe.

Our glider club is struggling with these issues currently as we can not get under 1000 gals of fuels delivered at the moment, we dont have that big a tank, so we have resorted to using a pickup truck with its bed mounted aux fuel tank to transport 100 gals at a time to refill our 300 gal trailor that we can not legally take to get filled due to restrictions etc.

If ever stopped we can argue that the Aux fuel tank is part of the trucks fuel supply system and avoid all the red tape of permits, licenses etc.