I'm thinking of storing #2 diesel for my JD 1250 in a 55 gallon drum (I have a barrel pump). The questions are these : Will I need to use #1 diesel in the winter ( Minnesota ) and If I use a second barrel for #1 do I need to worry about the not-full #2 barrel ( because I didn't use it all in the summer) collecting moisture ?
You ask wise questions.
When you buy off-road diesel for AG, and it's a bunch, be sure it's coming from a fresh source. If not, the microbes in the unfrequently used holding tanks at the stations or distribution centers can go bad much sooner causing expensive downtime.
I too store diesel due to keeping the price low and buying when the prices are best. Plastic tanks don't rust, don't dent, and attract condensation like metal tanks do. HDPE is the ideal plastic tank material in use for fuels.
I have both 15-gallon and 30-gallon tanks. Easy to move, and easy to fill/dispense. Easy to put in the back of the truck to fill too.
My location is in the bottom of zone-5, you are more in the center of zone-5. Beloit, WI gets down to -22F. Your location could see the -40F in the hardest part of winter. I use diesel #2 all year.
For the diesel #2 in storage, 30-gallon tank is treated with 1-bottle of Seafoam. It's far better than the PS junk sold everywhere. Never had any issues with microbes or diesel going bad. Plus Seafoam keeps the injectors nice and clean. This works far better than Stabil.
Your JD1250 is really a Yanmar YM5000, yet in JD green paint. Made in the same factory and assembly line as my YM2610.
Seafoam's original use is for diesel engines and fuel.