diesel still needs a stabelizer in the winter. in cold weather it turns into a gel , not good if it happens after you fill up your tank.
I keep about 300gal. and about 50 gal of gas on the farm. long term storage tanks with hand cranks and filter are avable at most agways. cost of a tank is around $500. they last forever. my tank is over 20 years old. I keep it out of the rain and snowand paint it every so often to prevent rusting.