We just felt like we shouldn't really go because we are doing nothing. We are using open shows as a fun day out for Ollie to interact with other dogs and for us to just watch other dogs. Now, we feel a bit stupid.
If you want to go, go and treat it as you said, a fun day out. The show will be as good as you make it and even if you are not officially placed, remember the Best In Show is the dog you take home with you! Enjoy your day.