Practicing Agility

I've been practicing agility in the backyard with Tilda lately. I set up a course that is more spread out and seems to be good practice for Tilda. It seems like she doesn't focus as well. But, it's hard to say because it is the backyard. The yard where she usually plays fetch. I'm thinking I should set up spread out courses most of the time. That is the way it is at a trial, so why not practice it that way?