I have paracord, trotline cord, baling wire, and ratchet straps in the toolbox plus a big stretch net I throw over everything on the flatbed. We usually wrap a tarp around all our gear like a big burrito, set gear on it wrap it over, tuck in the other side and ends. Then we throw straps and the net over it. I have a 40 gallon auxiliary diesel tank on the flatbed and when I hit a big temp swing it sometimes builds pressure and seeps a little around the cap. The tarp keeps us from getting diesel on any of our gear plus keeps it dry. The straps and net keep it tight and contained.
The trip I'm leaving on this afternoon I'm taking our Polaris Ranger in our 14ft half top stock trailer so I have lots of room. I have the Ranger strapped down so it can't move inside the trailer and the cooler and gas cans lashed to it. Greased the wheel bearings and tightened the axle nuts up a little the other day on the trailer, just had the truck and Ranger gone over to make sure they are good to go. We will stop a couple hours down the road and make sure the hubs on the trailer aren't hot, hit them with the grease gun again if needed. Hopefully it all holds up and is fine. The trailer is an 08 model so it isn't ancient. Checked tire pressure in everything this morning too.
I live near I-70 in KS, I see all the stuff along the roads too and all the hunting rigs driving or fueling up with hunters headed to CO. On my way back from Wyoming a few years back I ended up playing good Samaritan twice. A young ranch hand in Sheridan had locked his keys in his Dodge that was sitting at the diesel pump. I had enough tools we got the wing window on the extended cab open and he got his door unlocked that way. Truck was running, he hadn't even shut it off. Then in Lyman I towed a F250 6.0L Diesel full of Pennsylvania hunters from the fuel pumps where their truck quit to the shop they had lined up to work on it the next day, then gave them a lift to their hotel. I figure I will be the one needing help someday and I have been before so I always help if I can. Do unto others as you would have them do to you.