I'm starting my first garden. I live on some pretty low property which has been very wet lately. I pulled up a section of sod in the yard but it's now under 4 inches or so of water. I plan on ordering some top soil to build a raised bed. I'm thinking that I'll build a bed 8 feet by 15 feet and raise it by about 8 inches or so. I was going to order 3 yards of top soil. Does that sound right? I was going to have it dropped in the driveway and cart it out back in a wheelbarrow. Is that too much dirt to move by hand?