I personally didn't add that because as stated... it's a swamp... a bog... the ground will do that... plus I figured it would be a lot of work for little pay off... but I'll add it if it'll appease people...
I mean, I live in florida. I've walked around swamps and stuff... and thats exactly what its like... you step and almost fall... sometimes the mud on the bottom of the water can look one level. You step and you sing 3 feet... and then get bitten by something... it's... unpleasant...