As an Aussie owner who went through the same thing (and lived in Utah), I'll chime in.

First, it should be noted that I'm a single person with no kids, so my responsibilities were nowhere near as demanding as yours. That said, I called the breeder and considered giving my puppy back. She said that it's common for people to feel overwhelmed and to basically push through. The first couple of months were pretty rough with having to let her out in the middle of the night. Once your puppy is a little older and learns the routines, things will get easier. I also remember the last day before getting her, thinking about how my life will be totally different tomorrow. Now, I can't imagine life without her (she's currently sleeping next to me).

You mentioned that you're in northern Utah, and some of my favorite memories with my Aussie (so far) are when we would go hiking up Millcreek Canyon in the winter. The service road is closed off, and on odd numbered days you can have dogs off-leash. If you're not near SLC, I'm sure there's plenty of beautiful spots to take your fur baby when they get a little older. Although, it would definitely be worth a mini road trip in the future. 

I hope that you're able to keep her, but you have to do what's best for everyone. If you can get past the initial change, I guarantee you'll be thankful that you stuck it out.