The place where I refill my large tank requires an open vehicle (like a truck) and for the tank to be transported upright when you leave.

Since you only burn 2 gallons or so a winter, you can probably get by on a full 100 gallon tank for a few years (assuming you don't have to burn a pilot light all the time). And when it's empty, find a friend with a truck, or rent a Uhaul or Home Depot truck for an hour and transport it yourself.