Cans beer /cider /larger etc

[camperman]

The vast number of cans flattened and burried 3-9 inches or so both on the walk ways from the car parks and all over the site. most are now imposible to pick up. simple in dry years unlike tent pegs they are aluminium and wont pick up with the magnetic rake machines. there are only two ways i know and they both take years, either metal dectors and a spade or deep ploughing and rotorvating and field walking behind them. being a dairy farm returning it grass asap would make this difficult. I also wonder how many broken plastic trolley wheels are burried going on the amount of wheeless trolleys i saw. Its a good job they have 2 years to sort this out.