I am prepping my trailer to raise the sides. It is a 10 x 6. I want to use as a leaf box. Should i raise the sides 1 or 2 feet higher. i know its not large enough of a trailer to really hold to many leaves and still carry a mower but i am still going to make it work. So how high would you choose if you had a 10 x 6. it is 1 foot high right now.