re: Hardly
One hundred tons of something with the density of water could be concealed in 430 55-gallon drums, which would fit in a small warehouse, or about eight box trailer trucks. The myth that the WMD would be some mountain of material somewhere is nonsense.
Aside from the laughable idea of a couple of hundred U.N. inspectors "crawling all over" a country the size of California, it would have been easy to slip something like that away to be hidden somewhere. There is a lot our satellites miss.