Hey guys. I’m heading for some very high altitude camping soon and expect some below freezing temps at night. Also expecting to get some really low quality diesel fill ups. My question to you all is if you think maybe I might need some fuel heaters for my FASS system. I see from their website they have two different styles. They have a probe and also a ring that looks like it screws onto the filter housing? Anybody using these? If I’m not below like 20 degrees Fahrenheit are they necessary? I’m also thinking about just not turning off the truck at night. I also have a Honda generator I could crank up in the morning and plug in my block heater. Does that help much? Not very experienced in cold weather camping. Thanks for the replies.