M.F.
I have ascertained two things about potty training from my own experience and that of my friends.
1) no pull-ups (except when sleeping). If you're doing it, you do it all the way. No switching for an outing, etc. Don't get me wrong, pull-ups are fine as an alternative to a diaper, but if you're actively potty training, it's undies all the way.
2) if the kid doesn't want to do it, stop trying. It's a control/power battle. The more you want it to happen, the less she'll make it happen. Let it go, let her decide. "OK, if you don't want to pee pee in the potty, that's fine. I'll put these panties away until you're ready." Then re-stock her dresser drawer with diapers.