In the New York Times story about the missing explosives, they try to put things into perspective.
As a measure of the size of the stockpile, one large truck can carry about 10 tons, meaning that the missing explosives could fill a fleet of almost 40 trucks.
Even civilian trucks carry more than that. I worked my way thru school (among other things) unloading 18 wheelers. I only wish that was the capacity.
Interstates limit them to 40 tons or 80,000 pounds without an oversized load tag. There was an overloaded truck stopped at our state border carrying 112,000 pounds. (56 tons)
Even if you only put 50 tons per truck, using standard 18 wheelers, that is 8 trucks not 40. Again, these are civilian vehicles.
A military vehicle operating without highway restrictions could easily carry 80 tons. Considering 20% of the bunkers were destroyed during the war, it seems plausible that the remaining load could have been hauled away in as few as 4 trucks.
Not to pile on the Times, but 10 tons is a ridiculously low number.
Afterthought: I should have been more clear… That is gross vehicle weight, not all of that is payload because the truck weighs something empty. Still, you get the idea.