Hey, i am thinking of putting plywood sides on my 6X12 trailer and tarping leves into it. I mow a lot at the end of my street where a house was torn down and there is a 3 foot deep hole the size of an average foundation that needs topsoil. The owner said that i could dump leves/grass there as long as i spread lime on it and turn it every 6 months. VERY CONVEINIENT!! My question is how thick does the plywood have to be and what are the best designs for anchoring it to the trailer. Thanks!