Potty training setback

An update on the potty training front.
Norah has decided she wants to wear diapers again. Bummer. We had a very busy day yesterday. Norah woke up in a wet bed due to a huge diaper leak. A lousy way to start the day.
After their morning swim class was over, I asked the girls if they needed to go potty. Nope. So we go to a restaurant for lunch. In the middle of lunch, Norah announces "I have poopy." So we rush to the bathroom. Oops too late. But this time, it's a double oops because Mom didn't check the diaper bag and we're out of pull ups and diapers. So we make a run to the store. Just as I get a pull up on Norah (in the middle of the diaper aisle) she announces "I have poopy." So we rush to the bathroom (which is on the opposite side of the store). Oops too late again. And unfortunately for us, she ends up stepping in it. Ick.
She does have a few successes later in the afternoon and evening, but she's clearly disappointed. So today, I try to get her in pull ups. Nope. Norah decides no pullups for her. It's back to diapers. She does periodically like to sit on the potty (when it's convenient for her)....for instance, tonight, I'm getting the girls ready for bed. Norah announces "I not even sleepy. It still light outside." Then the delay tactics start...."I have poopy." Yep. Two trips to the bathroom within 10 minutes. We sit down to read a bedtime story and Norah has a stinky diaper. Lovely.