thing is, whoever did this needed a big truck, and probably some help....this was not easy task....personally, I wonder about the govt accounting practices....who really knows when this stuff went missing...
1 or 2 guys, some bolt cutters, and a van. too easy.
500 lbs would fit in the back of your pickup, including crates.
I can get 550 pounds of cargo in my first Gen Honda CR-V (spread out, of course, but I can do it). I often carry 600 pounds-worth of extra people in there besides myself (three tall adults at around 200 pounds or so each). From the pictures accompanying the article, nothing looked to be heavier than a sack of concrete. I'll bet I could have had it loaded and been gone in under 5 minutes, once the door was busted open.
It does not require a big truck to move 500 lbs. Just about any car and certainly any pickup truck is capable of transporting 500 lbs of cargo.