How to play buses for power

I am noticing the effect my attitude has on me when dealing with Genevieve. I started the pickup at pre-school in a good mood, due to the fact that we had plenty of time to make it to the bus. But then she lost her "gold coin" and we spent some time looking for it, a calculated plan and within the time we had. Now we were out of slack time, but I had honored her wish to find her toy (we found the coin).

At this juncture, she dawdles. Walks over to her friends and converse and say goodbye, even though she had been saying goodbye for fifteen minutes. Doesn't "hear" me asking her to come with me, that we needed to get going. Finally comes, but announces that she is hot in her coat and must have water now. Walks away from me again. Our walk time to the bus is now one minute longer than when the bus is scheduled to arrive.

At this point, I simply say "that's it," chase her down, pick her up, tuck her under my arm, and leave the preschool room with her flailing and crying. I drag her by the hand all the way to the bus, which we barely make. I am not a happy camper. It is 5 degree wind chill and I don't want to wait an extra hour. I am not having a successful daddy moment. She's got me right where she wants me -- she is winning the power struggle.