That's a lot of trucktrucks. You may find that many vehicles in a few convoys, but certainly not all would be armoured trucks. For nuclear waste, the armour is strictly a function of containing radioactive material safely, and the truck is just a bog-standard truck. The rest of the escort would ride in military trucks or jeeps, which wouldn't need to be armoured. For POTUS, the only armoured vehicle in the convoy is the limo. The rest is once again just bog-standard vehicles, because the people inside just aren't that valuable.
That much manpower probably comes with a convoy of that size naturally. If you have two dozen vehicles, put four people in each and that's already the required amount of guns. A convoy that big would require the cooperation of local police, and so some of the armed personelpersonnel in the convoy would have to be law enforcement rather than military or private security.
Looking at real world example, we have nuclear wasterwaste and POTUS. So basically anything that can potentially level the country. Nuclear warheads, top secret alien debris, experimental superweapons, a real-life Superman, etc. Whatever it is, it has to blow your mind. I have to insist on that. Being high value just isn't enough to be worth the hassle, it needneeds to be a game changer if it falls in the wrong (i.e. not yoursyour) hands.
You also have to consider one last thing: it would be less conspicuous to move one truck at a time than have one giant convoy. The main reason you'd go for a superconvoy is because time is of the essence. There is some emergency that requires all of the goods to be transported ASAP.. Otherwise, you risk much less by transporting them one at a time. Especially if you need all the parts to assemble your doomsday device, or whatever it is you transport.
