We've pulled a 2016 Jeep JKU without problems. Blue Ox towing kit, dealer installed.
Just back from first long trip out, and would parrot Old Crows recommendations, except that we've been using truck stop bulk DEF without any issues. Some say it's fresher than the jugs because it gets used regularly by the semi rigs, and so the supply is always being refreshed. Most bulk DEF is half the price or less of the jugs and there's none leftover, if being frugal matters to you. When filled, our DEF tank seems to last forever.
As far as diesel goes, that's where the truck stops fail. Many have added blends of bio-diesel to their pumps, and some are in the range of 5% to 20% which isn't recommended to be used in the MB 3.0L V6 turbo-diesel engines. Less than 5% bio-diesel is not desirable but MB says it can be used if necessary. If the diesel pump isn't marked at all, then the most the bio-diesel content can be is < 5%, by law. If it's marked with a label about bio-diesel it's probably going to be anywhere from 5% to ??%. We try to keep the bio-diesel out of our tank if possible, but sometimes it's unavoidable. Just read the labeling on the pumps, and be aware and you'll be OK. Dino-diesel preferred. Murphy USA, Exxon Mobil, and Meijer store pumps seem to be mostly dino-diesel near me, so I try to stick with them. Sam's Club also seems to have dino-diesel, when they have diesel. I think most Canadian fuel stops have very limited bio-diesel, so traveling in Canada should be worry free.
As for storage, it's pretty much put stuff wherever it fits. We downsized from a Sunstar 26HE, and went from 150 cu ft to just over 40 cu ft, if memory serves. Not pretty.
We use a pair of pillows, sleeping bags, and thermally insulated blankets we got in the sporting goods department at Walmart. Total cost was under $100, I'm thinking, give or take. We also have the froli system and the acrylic dual pane windows for extra insulation.