So far, so good in the back. Here's some of the progress:
Here is some of the trenching for the additional sprinkler heads required. The zones for the previous lawn were broken into two halves. We removed one half when we added the play set, which is shown below. Unfortunately, that left about a quarter of the remaining lawn without water, so we need to add three heads to one side.
Here's my son helping out.
Below is where we're currently at. We need to drop a couple of inches of compost and till it in, then we'll be ready for the sod.