Go up main street, at the hub, take a left onto the path to Adventureland. Just after you go over the wooden bridge into Adventureland, (and under the big sign that says "Adventureland") it's on the right. It's just before the entrance to the Swiss Family Robinson Tree House. If she gets to the treehouse, she has gone too far. HTH
I've had many, many Dole Whips from Disneyland and WDW over the years and bland is not a word I would use to describe them. If you get the straight pineapple one, the pineapple flavor should be very pronounced. Perhaps there was something wrong with the machine or they put the wrong mix in the machine. If you like pineapple, you may want to give it another try.