The size of the camp, for those in the UK, would be about three times the size of Birmingham. Just take a look at the size of Birmingham UK on google maps and triple it in your mind.
Imagine the fecal swamp that would be created overnight by 3 million people folding out yesterdays digested manna.
Now imagine squelching your sandalled feet through acres of colon created stinking bog and the accompanying fog of swarming flies, every time the camp moved location.
Pining for cucumbers would be the last thing on my mind, unless they were going to be used as bum plugs.